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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.
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Featured calculators
- Health & Body
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.
- Finance & Money
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.
- Construction & Home
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.
- Unique & Playful
Height Comparison Tool
Compare heights on a zoomable chart: people, celebrities, athletes, dinosaurs, cars, landmarks and fiction, in cm and feet, with a source for every real height.
- Conversions & Units
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.
- Health & Body
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 →- Data study Updated Read the data study →
Deposit Insurance Coverage Index: what a bank guarantee is really worth
The same €100,000 deposit guarantee covers 6.2 years of income in Bulgaria but only 0.96 in Ireland. We compare the legal limits in 68 jurisdictions.
- Data study Updated Read the data study →
How the world writes numbers
29 of 57 locales write decimals with a comma, so a lone “1.000” is one in New York and a thousand in Berlin. A sourced reference to each convention.
- Data study Updated Read the data study →
The Phantom-Power Index: what always-on devices really cost per year
A cable box with DVR left on standby costs about €110 a year at the EU average power price. We rank 35 always-on devices by yearly standby cost, 2025 tariffs.
Recently added
- Days From Today Calculator Date & Time Added
- Height Percentile Calculator by Age, Sex & Country Health & Body Added
- Tire Size Comparison Conversions & Units Added
- Car Depreciation Calculator Finance & Money Added
- cm to Feet & Inches Height Converter + Full Chart Conversions & Units Added
- Waist to Height Ratio Calculator (WHtR) Health & Body Added
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