Every calculator you need.
Free, instant, no fluff.

Finance, health, math, dates and everyday life — with the formula shown under every result, so you can check the work.

Popular calculators

Mortgage Calculator

Estimate your monthly mortgage payment from home price, down payment, interest rate and term — with taxes and insurance included.

Loan Calculator

Work out the monthly payment, total interest and total cost of any fixed-rate loan from amount, rate and term.

Compound Interest Calculator

See how savings or investments grow with compound interest, including monthly contributions.

Work out the tip and total bill — and split it per person — in one tap.

Discount Calculator

Find the sale price and the money saved from any percent-off discount — including stacked discounts.

Amortization Calculator

Full amortization schedule for any loan: yearly principal, interest and remaining balance.

Browse by category

Loans, mortgages, interest, savings and salary math.

Health & Fitness

BMI, calories, macros, heart rate and training numbers.

Percentages, fractions, geometry, algebra and statistics.

Ages, date gaps, countdowns, durations and workdays.

Tips, fuel, electricity, shopping and around-the-house math.

Construction & DIY

Concrete, flooring, paint, roofing and material estimates.

Recipe scaling, unit swaps, ratios and kitchen timing.

Car loans, fuel costs, tires and ownership math.

Margins, markup, VAT, rates, payroll and startup numbers.

Pregnancy & Baby

Due dates, ovulation, milestones and growth.

GPA, grades, test scores and study planning.

Pace, scoring averages and training numbers.

Bandwidth, storage, screens, colors and developer math.

Pet ages, random numbers and playful calculators.