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113+ fast, accurate, beautifully designed calculators — finance, loans, tax, health, education and everyday math. Free, no sign-up.
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Financial40 calculatorsInterest, investments, savings and tax tools.Trading25 calculatorsPosition sizing, risk, options and trade-analytics tools.Loans & Mortgage18 calculatorsRepayments, EMIs and amortisation schedules.Health & Fitness8 calculatorsBMI, calories, metabolism and body metrics.Math & Everyday12 calculatorsPercentages, dates, ages and everyday math.Fuel & Vehicle3 calculatorsFuel costs, mileage, ethanol blends and running-cost tools.Education7 calculatorsMarks, grades and percentage conversions.
Collections
Planning to Buy a Home?5 calculatorsWork out what you can borrow, your EMI, and how prepaying saves interest.Retirement & FIRE6 calculatorsBuild a corpus, plan withdrawals, and find your financial-independence number.Salary & Tax (India)5 calculatorsDecode your CTC, compare tax regimes, and check HRA and GST.Ethanol Fuel Calculators (India)3 calculatorsWork out your E20 mileage loss, compare petrol, E20, CNG and EV running costs, and see what is in an ethanol blend.For College Students5 calculatorsConvert grades, track attendance, and crunch percentages.Health Check5 calculatorsBody composition and daily targets, from BMI to water intake.
Popular calculators
- Compound InterestFuture value, total interest and APY with optional regular deposits, withdrawals and a full breakdown.
- EMIEquated monthly instalment, total interest and total cost for home, car and personal loans, with a full amortisation schedule and principal-vs-interest breakdown.
- Tax RegimeCompare India's old and new income tax regimes for FY 2025-26, see your tax under both, your savings, and which regime to choose.
- BMIBody mass index from height and weight, with healthy-range guidance.
- SIPProject the maturity value, total invested and estimated returns of a monthly SIP (systematic investment plan) in a mutual fund, with a year-by-year growth chart.
- PercentageWork out what is X% of Y, what percent one number is of another, and the percentage increase or decrease between two values.
New this week
- Semester GradeCalculate your weighted semester grade from assignment, quiz, midterm and final scores — plus find out what you need on the final exam to hit your target grade.
- Final GradeFind out what score you need on your final exam to achieve your target course grade — instantly solves the weighted-grade equation for any final exam weight.
- Ethanol BlendFind the ethanol and petrol volumes in any E-blend (E5, E10, E20, E85) and see the theoretical energy content compared to pure petrol.
- Fuel Cost/kmCompare your real running cost per km across petrol, E20 (ethanol blend), CNG and EV — see which fuel saves you the most money every month.
- E20 Mileage ImpactSee how much mileage you lose and the extra fuel cost per month and year on E20 petrol — from your car's km/L, monthly distance and pump price.
- Breastfeeding CaloriesEstimate daily calories while breastfeeding — Mifflin-St Jeor BMR × activity plus a lactation add-on (500 kcal exclusive, 330 partial), per CDC and FAO.
- Instant, no sign-up
- Verified formulas & sources
- Privacy-conscious data handling
Frequently asked questions
- Are the calculators free?
- Yes — every calculator on TheCalculatorHive is free to use, with no sign-up or account required.
- Do I need to create an account?
- No. Every tool works instantly with no account or sign-up. The numbers you enter are sent to a stateless calculation API only to generate your result and are not stored afterwards, and shareable result links encode those numbers in the URL itself. See our Privacy Policy for details.
- How accurate are the results?
- Each calculator uses verified formulas with cited sources, and the math is covered by an automated test suite. Results are for general guidance, not professional financial, tax, or medical advice.
- Can I bookmark or share a result?
- Yes. Use the “Copy link” button on any calculator — the link reproduces your exact inputs so you (or anyone) can reopen the same calculation.
- Can I suggest a calculator?
- Absolutely — use the Contact page. We add new calculators regularly across finance, loans, tax, health, education and math.