Safe vs Units

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Units is a pocket tool for the numbers you keep looking up. Convert units and currency, run everyday calculations, check a formula or a constant, and do the sum on a calculator that stays out of the way. UNIT CONVERSION Pick a category and enter a number. Every unit in that category is converted at once, so you never have to choose what to convert to. • Seven categories: length, weight, temperature, volume, area, speed and currency. • Metric, imperial, US and traditional Chinese units: feet, pounds, Fahrenheit, gallons, jin, mu and more. • Look-alike units are listed separately, such as US and UK gallons, or tonnes and short tons. • Pin the units you use most, and tap any result to copy it. CURRENCY • 22 widely used currencies with rates updated daily. The last rates are kept for when you are offline, and the rate date is always shown. • Drag currencies into the order you want and hide the ones you don't need. • Rates are mid-market reference rates. Your bank or card rate will differ. CALCULATORS Fill in a few numbers and get the answer. Every field comes with a short note on what to enter. • Pensions: China urban employee pension, a stop-or-keep-contributing comparison, and Canada CPP + OAS + GIS. • Loans and savings: fixed-payment and fixed-principal loans, compound interest, annualized return. • Health and fitness: BMI, pace. • Spending and travel: discounts, unit price, tip and split, percent change, fuel cost, electricity cost. • Pension results can be shared as a clear one-page image, with age and income hidden. FORMULAS • More than 100 formulas across math, physics, chemistry, finance and economics, grouped by topic: triangles, electricity, solutions, interest and more. • Formulas are properly typeset, and the meaning of every symbol is listed underneath. • Search by name. Some formulas take your numbers directly. CONSTANTS 51 constants from math, physics, chemistry and astronomy, with units and a short note. Tap one to copy its value. CALCULATOR Pull up a half-height calculator from any screen and keep reading the formula above it. Brackets, percent, powers, roots, trig functions, logarithms, factorial and π, with the result shown as you type. ALSO • English and Simplified Chinese, switchable at any time in Settings. • No account, no personal data collected, no ads. Formulas and constants are provided for reference; check important calculations against an authoritative source. Pension and loan calculations are rough estimates based on published rules. They are not official figures and not financial or investment advice.