CalcHub

150+ free calculators for finance, health, math, tax & more. No sign-up. No fluff. Just answers.

150+ Calculators 15 Categories 100% Free No Sign-up Required

⚡ Most Popular Calculators

💳Loan Payment 📈Compound Interest 🏡Mortgage PITI ⚖️BMI Calculator 🧾Income Tax 🏖️FIRE Calculator 🔥FIRE Number 🔥TDEE / Calories ❄️Debt Snowball 💼Profit Margin 🌡️Temperature 🎂Age Calculator

💰 Finance Calculators

📈
Investment & Wealth
16 calculators
Compound interest, ROI, FIRE number, 401k growth, dividend yield, DCA, net worth tracker.
Compound InterestFIRE401kROI
💳
Loans & Debt
12 calculators
Loan payments, credit card payoff, debt avalanche vs snowball, DTI ratio, APR, student loans.
Loan PaymentCredit CardDebt Payoff
🏡
Real Estate
10 calculators
Mortgage PITI, affordability, rent vs buy, refinance break-even, closing costs, rental yield.
MortgageRent vs BuyRefinance
🧾
Tax Calculators
10 calculators
Federal income tax, paycheck withholding, capital gains, self-employment tax, sales tax.
Income TaxPaycheckCapital Gains
🏖️
Retirement
9 calculators
Retirement savings readiness, 4% rule, Social Security estimator, RMD, when can I retire.
4% RuleSocial SecurityRMD
💼
Business & Freelance
10 calculators
Profit margin, markup, freelance rate, break-even, LTV, SaaS churn, cash flow.
Profit MarginFreelance RateBreak-Even

❤️ Health & Fitness Calculators

🏃
Health & Body
10 calculators
BMI, BMR, TDEE, body fat %, ideal weight, heart rate zones, macros, calories burned.
BMITDEECaloriesMacros
💪
Fitness & Training
8 calculators
One-rep max, VO2 max, training paces, calorie burn by exercise, protein needs, sleep.
1RMVO2 MaxRunning Pace

🔢 Math & Science Calculators

📐
Math & Geometry
10 calculators
Percentage, area, quadratic equations, statistics, fractions, exponents, volume, Pythagorean theorem.
PercentageStatisticsGeometry
🔄
Unit Converter
10 converters
Length, weight, temperature, speed, volume, area, data storage, energy, pressure, cooking.
LengthWeightTemperature
🔬
Science & Physics
8 calculators
Ohm's law, density, force & acceleration, wavelength, half-life, pH, speed of sound, kinetic energy.
Ohm's LawPhysicsChemistry

🗓️ Everyday Calculators

📅
Date & Time
8 calculators
Age calculator, days between dates, countdown timer, business days, work hours, day of week.
AgeCountdownBusiness Days
🚗
Auto & Driving
8 calculators
MPG, fuel cost for road trips, car depreciation, lease vs buy, true cost of ownership, EV vs gas.
MPGFuel CostLease vs Buy
🍽️
Tip & Bill Splitter
4 calculators
Tip calculator, bill splitter, restaurant check divider, delivery tip guide.
TipSplit Bill
🎲
Random & Fun
6 calculators
Random number generator, dice roller, coin flipper, password generator, lottery odds.
RandomDicePassword