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Use the calculator index to jump to GST, EMI, FD, salary, tax, savings and other tools.
HOW IT WORKS
Choose a tool. Enter your values. Get a clear estimate.
All 16 calculators are available on this page. Use the quick index to jump directly to the calculator you need.
Enter your details
Fill in the required values. Calculations run in your browser for quick results.
Review your estimate
Check the result and verify important financial or tax decisions with a qualified professional.
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FREE ONLINE TOOLS
16 practical calculators, organised in one place.
No sign-up. Enter your numbers and calculate instantly. These tools are designed for everyday personal and small-business use.
Tip: Search by the task you want to do. Select a category to narrow the list. You can also use the quick links below.
Showing all 16 calculators.
Jump to a calculator
1. GST Calculator2. Loan EMI Calculator3. Fixed Deposit (FD) Calculator4. Discount Calculator5. PF / EPF Calculator6. Bank Savings Account Interest Calculator7. Salary Calculator8. SIP Calculator9. Inflation Calculator10. BMI Calculator11. Fuel Cost Calculator12. Basic Income Tax Calculator (India)13. Age Calculator14. Electricity Bill Calculator15. TDS Calculator on Salary16. Profit & Loss Calculator
01 · GST
GST Calculator
Calculate GST amount and total price, or extract GST from an inclusive price.
Result will appear here.
02 · EMI
Loan EMI Calculator
Estimate monthly instalment, total repayment and total interest.
Result will appear here.
04 · SHOPPING
Discount Calculator
Calculate the discount amount and final payable price.
Result will appear here.
03 · SAVINGS
Fixed Deposit (FD) Calculator
Estimate FD maturity value and interest using compound interest.
Result will appear here.
Indicative estimate only. Actual bank payout, tax and premature-withdrawal rules may differ.
05 · RETIREMENT
PF / EPF Calculator
Estimate your future EPF balance from monthly contributions and an assumed annual interest rate.
Result will appear here.
Enter the total monthly amount actually credited to EPF. This estimate does not calculate EPS pension diversion, salary caps, withdrawals or changing EPFO rates.
06 · BANKING
Bank Savings Account Interest Calculator
Estimate savings interest using your average daily balance, annual interest rate and number of days.
Result will appear here.
Illustrative daily-balance estimate using a 365-day year. Actual bank credit frequency, tax and balance rules may differ.
07 · PAYROLL
Salary Calculator
Calculate estimated hourly, daily, weekly and half-yearly salary from your monthly salary and working schedule.
Enter all three values to see your salary breakdown.
Weekly salary is estimated as monthly salary × 12 ÷ 52. Half-yearly salary is monthly salary × 6. Hourly and daily rates use your stated working schedule.
08 · INVESTMENTS
SIP Calculator
Estimate the future value of a monthly Systematic Investment Plan (SIP), total amount invested and potential returns.
Enter all three values to estimate your SIP value.
Illustrative estimate assuming a fixed monthly investment at month-end and a constant monthly-compounded return. Actual mutual fund returns are market-linked, not guaranteed; taxes, fees and exit load are not included.
09 · INFLATION
Inflation Calculator
Estimate how much today's money may be worth in the future, or the future amount needed to match today's purchasing power.
Enter all three values to see the inflation estimate.
Estimate uses compound annual inflation: future cost = current amount × (1 + inflation rate)years. Actual inflation varies over time and by product or service; this is not a forecast.
10 · HEALTH
BMI Calculator
Calculate Body Mass Index (BMI). Adult BMI categories are shown only for adults aged 18 and above.
Enter your age, height and weight to calculate BMI.
Adult reference categories: Underweight (below 18.5), Healthy (18.5–24.9), Overweight (25.0–29.9), Obesity (30.0 or above). BMI is a screening measure, not a diagnosis. For people under 18, BMI is interpreted using age- and sex-specific growth percentiles; this adult calculator does not provide that assessment.
11 · TRAVEL
Fuel Cost Calculator
Estimate the fuel required and total fuel expense for your journey.
Enter distance, mileage and fuel price to estimate your journey cost.
Estimate = distance ÷ mileage × fuel price. Actual fuel use and cost may vary with traffic, road conditions, driving style, vehicle load and fuel-price changes. Enter the total journey distance, including return travel if applicable.
12 · FINANCE
Basic Income Tax Calculator (India)
Estimate annual income tax for an individual under the old or new tax regime for Tax Year 2026–27.
Enter your annual income to estimate tax.
Indicative Tax Year 2026–27 estimate. Select age category and residential status for the applicable old-regime basic exemption slab; Section 87A rebate is applied only where eligible. Includes salary/pension standard deduction, applicable rebate and surcharge with marginal relief, plus 4% health & education cess. Assumes income taxed at normal slab rates; special-rate income (including certain capital gains), every exemption/deduction, tax credits, and individual-specific adjustments are not covered. Verify with the Income Tax Department or a qualified tax professional before filing.
16 · BUSINESS
Profit & Loss Calculator
Enter your cost price and selling price to calculate business profit or loss and its percentage on cost.
Enter cost price and selling price.
Profit / Loss = Selling Price − Cost Price. Profit or loss percentage = absolute difference ÷ Cost Price × 100. This basic calculation excludes taxes, fees, freight, discounts, overheads and other business expenses unless included in the cost price.
15 · SALARY & TAX
TDS Calculator on Salary
Estimate annual salary TDS under the new or old tax regime and the monthly deduction needed for the remaining months.
Enter annual salary to estimate TDS.
Indicative Tax Year 2026–27 estimate for an individual below age 60. Select residential status to apply Section 87A rebate only where eligible. Includes salary standard deduction, applicable rebate and surcharge with marginal relief, plus 4% cess. Monthly balance = (estimated annual tax − TDS already deducted) ÷ months remaining. Actual employer TDS may differ due to declarations, perquisite valuation, other income, previous-employer salary, exemptions, tax credits and payroll rounding. Confirm with your payroll team or a tax professional.
13 · DATE & TIME
Age Calculator
Calculate your age in years, months and days using your date of birth and a reference date.
Select your date of birth to calculate age.
The reference date is filled with today’s date automatically. You can change it to calculate age on another date.
14 · UTILITIES
Electricity Bill Calculator
Estimate your electricity bill from units consumed and your per-unit rate.
Enter units and your tariff rate to estimate the bill.
Estimate = units × rate + fixed charges + other charges. Actual bills may include slab-wise tariffs, meter rent, fuel adjustments, electricity duty, subsidies and state/DISCOM-specific items. Enter these under Other charges where applicable; check your latest tariff and bill.
Important: Results are estimates for convenience. GST treatment, loan terms and business accounting depend on your actual circumstances; verify before making financial, tax or legal decisions.
BUSINESS & PARTNERSHIPS
More than calculators: tools for people and businesses
Explore advertising, integrations, licensing and digital products. Basic calculators remain free. Commercial services are offered by enquiry and subject to review.
Advertising & sponsorship
Display advertising, direct brand campaigns, sponsored placements and sponsored educational content. Advertising appears only when publisher and campaign approvals are in place.
Enquire about advertising →Affiliate partnerships
Relevant financial, business and software referrals through approved partner programmes, with clear affiliate disclosures. No partner links are active until approved.
Propose a partnership →Premium subscriptions
Planned Pro features: saved calculations, calculation history, advanced reports, PDF export and an ad-light or ad-free experience.
Join early-access interest list →Calculator API
Approved businesses can integrate selected calculations using authenticated API keys, usage limits and documented endpoints. Access is reviewed manually.
Read API documentation →White-label & enterprise
Branded calculator suites, private deployments, enterprise licensing and multi-user business access, scoped and quoted for each organisation.
Request a business quote →Embeddable calculator widgets
Compact calculator widgets for publisher, SaaS and business websites, with branding and integration options subject to a written agreement.
Request widget details →Custom calculator development
Custom business, payroll, pricing, quotation, tax-estimation and workflow calculators built to an agreed specification.
Discuss a custom tool →Reports, guides & templates
Planned paid downloadable reports, practical guides, Excel and Google Sheets templates, and business calculation packs.
Register product interest →Business tools & consulting
Business workflow setup, calculator selection, implementation support and training for teams. Any professional advice is separately scoped and qualified.
Discuss business support →Featured listings & sponsorships
Clearly labelled paid placements for relevant business tools and services. Listings are subject to quality, relevance and disclosure checks.
Request a listing →Qualified enquiry referrals
Optional introductions to relevant providers only when a visitor explicitly requests contact. Personal data is not sold as a list or shared without consent.
Discuss referral partnership →Mobile app & learning content
Potential mobile app subscriptions, calculator learning modules and educational courses, developed only after validating user demand.
Share your interest →INDICATIVE PLANS
Simple starting packages
These are proposed prices for planning and enquiries, not an active checkout or paid subscription. Final features, taxes and terms will be confirmed before launch.
Free
₹0 / always
- Public browser-based calculators
- Basic calculation results
- No account required for basic use
Professional
₹199 / month · proposed
- Planned calculation history and saved results
- Planned PDF export and advanced reports
- Planned ad-free experience
Business
₹999 / month · proposed
- Planned business calculator suite
- Planned team access and reporting
- Priority implementation enquiry
API & White-label
Custom / quote
- API access after technical review
- Widget and white-label options
- Usage limits and written commercial terms
Transparency: AdSense approval, affiliate approvals, subscription checkout, paid downloads and automated billing are not confirmed as active. No payment is collected on this page. We will publish clear terms and disclosures before any paid feature goes live.
GROWTH & REVENUE
How the calculator platform can grow
Additional monetisation channels will be activated only after quality, traffic, partner approval and compliance checks. No income or ranking is guaranteed.
AdSense and premium networks
Apply to AdSense when publisher requirements are met. Consider other networks only after checking their current traffic and content eligibility.
Relevant affiliate resources
Clearly disclosed partner information may appear next to relevant calculator results. No guaranteed loan approval, investment return or product endorsement.
Partner lead introductions
Visitors can explicitly request contact from an authorised provider. No sale of contact lists or sharing of enquiry details without clear consent.
Hindi + English growth
Build useful bilingual calculator pages, worked examples and FAQs based on real search intent rather than duplicate keyword pages.
Digital asset sale
A mature site may become a saleable digital asset if traffic, earnings, ownership and compliance records are independently verifiable.
Opt-in newsletter
Offer useful optional planners and calculator guides. Marketing emails require separate consent and a clear unsubscribe option.
Free + ads + affiliate + premium
Use free tools to attract visitors, restrained approved ads and disclosed relevant partner links; validate premium features before launching paid plans.
Finance, salary, tax and business tools
Prioritise validated additions such as CAGR, PPF, retirement, rent-vs-buy, HRA, gratuity, break-even and profit margin calculators.
Financial-product referrals are for eligible adults only and must use appropriately authorised partners. Health links will not promote supplements or unverified health claims. Network RPMs, commissions, valuation multiples and search timelines vary and are not promised.
HYBRID BUSINESS MODEL
Free tools, useful content and optional upgrades
Our growth roadmap combines quality calculators, non-intrusive approved ads, clearly disclosed partnerships and optional business features.
Newsletter and free planner
Optional email resources and newsletters with clear consent and unsubscribe controls. Email capture is not currently active.
Finance, salary, tax and business
Future tool opportunities include CAGR, PPF, retirement, HRA, break-even, rental yield and gratuity. These are planned topics, not live calculators yet.
Improve what works
Measure useful visits, engagement, partner clicks and customer interest before expanding paid products or advertising.
The sequence is quality and SEO first, then eligible advertising and disclosed affiliate tests, followed by consent-based email and validated premium/B2B products. Revenue is not guaranteed.
PRODUCTS & PARTNERSHIPS
More ways the platform may create value
Future options include advanced reports, business tools, expert introductions and sponsored calculator experiences—only after they are properly built and approved.
Advanced features and reports
Planned PDF/Excel exports, calculation history, scenario comparisons and downloadable reports. These paid features are not active yet.
White-label, API and widgets
Potential branded embeds, usage-based API plans and custom calculator development for organisations.
Sponsored tools and articles
Relevant sponsored placements will be clearly labelled and kept separate from independent calculator results.
Professional introductions
Optional introductions to qualified professionals may be offered with clear consent and appropriate eligibility checks.
Member resources
Exclusive tools, webinars and learning resources are future ideas; no membership or recurring billing is currently active.
Ads will not interrupt calculator inputs or results. Financial-product referrals are restricted to eligible adults and authorised partners. Paid backlinks and misleading sponsored placements are not offered.
STACKED MONETISATION
One useful calculator, multiple revenue paths
Build user trust with a fast free result, then add relevant optional services without interrupting the calculation.
Useful tools and restrained ads
Approved advertising can support free access. Keep ads away from input-to-result flow and protect site speed.
Relevant next steps
Disclosed partner links and consent-based introductions may follow a result where appropriate and legally permitted.
Advanced and developer tools
Saved scenarios, reports, bulk calculations and API access are potential paid products, not currently active services.
Licensing and specific search needs
White-label tools, sponsorships and original long-tail calculator pages can support future growth.
No revenue examples or third-party earnings claims are treated as forecasts. Proposed international prices are not active offers. User experience, accurate results and transparent disclosures take priority.
ADDITIONAL REVENUE OPTIONS
More ways to grow the calculator platform
Potential ad partners, affiliate programmes, quote requests and co-branded tools can be evaluated as the audience and product mature.
Display and native advertising
Evaluate eligible networks such as AdSense, Media.net, PropellerAds or Raptive. Native placements must be clearly labelled and non-intrusive.
Relevant software and services
Research suitable finance, accounting, CRM, hosting and e-commerce partner programmes. No affiliation or approval is implied.
Co-branded calculator partnerships
Potential sponsored or powered-by tools with transparent branding and independent calculation logic.
Optional professional enquiries
Any provider introduction requires clear information and explicit consent before sharing details.
Traffic levels do not guarantee income. Partner availability and approval vary. No new ad network or affiliate programme is active merely because it appears in this roadmap.
HELP & FAQ
Quick answers
Short answers to common questions about the free online calculators.
Are the Friendly Calculator calculators free?
Yes. The calculators on this page are free to use and do not require an account.
Are my calculator values uploaded?
The main browser calculators process the values you enter on your device. Contact and API enquiry forms send only the information you submit.
Can I use these results for tax or financial decisions?
Use results as estimates only. Tax rules, bank terms and individual circumstances can change the final amount. Verify important decisions with the relevant authority or a qualified professional.
How can a business integrate a calculator?
Review the API documentation and submit an access enquiry. API access is limited and subject to approval.
CONTACT Friendly Calculator
Contact, partnerships and business enquiries
Send a message about support, advertising, partnerships or API access. Your enquiry is submitted securely and saved so our team can review and respond.
B2B · API ACCESS
Integrate Friendly Calculator tools into your business
Integrate selected calculators through our HTTPS JSON API. The API gateway is active for approved integrations; access keys are issued manually after review.
Security: Do not send an existing API key, password, OTP or secret through this form. API keys are issued by an administrator and must be stored server-side. Never expose them in browser code, public repositories or this enquiry form.