Everyday Calculators

Quick math, health, and conversion tools — free in your browser.

Search tools

Browse popular tools below, or filter by name and keywords.

Everyday Math

2 tools

Percentage Calculator

Find percentages, discounts and mark calculations.

Date Difference Calculator

Find days, months and years between two dates.

Health & Life

2 tools

Age Calculator

Calculate exact age from date of birth.

BMI Calculator

Body mass index calculator with category.

Converters

1 tools

Unit Converter

Convert length, weight, temperature and more.

What are ToolNest Everyday Calculators?

A collection of free browser-based calculators for common daily tasks — percentages, age from date of birth, BMI, unit conversions, and date differences between two calendar days.

Quick & private

Calculations run in your browser. No sign-up required. Results are for general information only.

ToolNest