Calculators

Use free online calculators for BMI, age, percentages, scientific math, and everyday planning. Fast browser tools with no sign-up required.

All Tools Math Finance Health Everyday

Math

Percentage tools and scientific math calculators

Percentage Calculator

Calculate percentages, percentage increases, and decreases.

Scientific Calculator

Calculate advanced math expressions with trigonometry, logarithms, powers, roots, constants, memory, and history.

Random Number Generator

Generate random integers or decimals with custom ranges, unique sampling, exclusions, sorting, and multiple sets.

Unit Converter

Convert length, mass, area, volume, time, temperature, speed, density, power, energy, force, pressure, storage, angle, illuminance, torque, resistance, voltage, and current.

Finance

Planning tools for payments, savings, and decisions

Loan Calculator

Compare fixed-payment loans, fixed-principal loans, deferred lump-sum loans, and bond face-value maturity scenarios.

Health

BMI and health reference calculators

BMI Calculator

Calculate your Body Mass Index (BMI) and determine if you are in a healthy weight range.

Pregnancy Calculator

Estimate due date, gestational age, trimester, and key pregnancy milestones from LMP, ultrasound, conception, IVF transfer, or an existing due date.

Everyday

Quick calculators for dates, ages, and daily tasks

Age Calculator

Calculate your exact age in years, months, weeks, and days based on your birth date.

Date Calculator

Calculate days between dates, add or subtract from a date, find the weekday, and check week numbers.