Free calculators. Instant answers.
A library of calculators for money, math, health, dates, conversions, and the everyday — no sign-up, no tracking, and the answer's ready the moment the page loads.
Browse by category
Featured calculators
Steps to Miles Calculator
Convert steps to miles and kilometres using a published pace- and height-aware equation, not the unsourced 0.413 stride multiplier. Metric or imperial.
Net Worth Calculator
Add up your assets and subtract your debts to find your net worth, in any currency. Cash, investments and property versus mortgage, loans and credit cards.
BTU Calculator
Find the right AC or heating size for any room. Enter floor area, sun exposure, occupants, and ceiling height to get BTU, tonnage, and output.
Height Comparison Tool
Compare heights side by side on a zoomable chart: people, celebrities, athletes, pets, cars and landmarks, in cm and feet, with a source for every figure.
Shoe Size Converter
Convert shoe sizes instantly between US (men/women/kids), UK, EU and Japanese sizing. Enter your foot length or a known size to see all systems at once.
Mean Arterial Pressure (MAP) Calculator
Find mean arterial pressure, pulse pressure, and your blood-pressure category from a systolic/diastolic reading. ACC/AHA and ESC guidelines. Free, instant.
From our research
Guides & data studies →Deposit Insurance Coverage Index: what a bank guarantee is really worth
If your bank fails, how much is guaranteed? We compare statutory deposit insurance ceilings across 68 jurisdictions in one currency and against income.
How the World Writes Numbers
A sourced reference for how 57 locales write 1,234,567.89 — decimal marks, group separators, Indian lakh grouping and the SI recommendation.
The Phantom-Power Index: what always-on devices really cost per year
Which always-on devices cost the most in standby power? We rank 35 devices by yearly standby cost and price four across countries. 2025 data.
Built for fast, honest answers — and nothing else.
Open any calculator and get your answer. No account, no email wall, no paywall.
No ad networks and no tracking cookies trailing you from page to page — only privacy-friendly, cookieless analytics.
Ten languages, with full right-to-left support for Arabic and Urdu built in.
Mobile-first and lightweight, so the answer loads instantly even on a slow connection.