Tools
Free online tools and utilities
ToolsProbability Calculator Online — Calculate Single and Multiple Event Probability
Need to calculate the probability of one or more events occurring? Get exact probability values instantly without doing the math manually.
ToolsConfidence Interval Calculator Online — Calculate CI Instantly
Need to calculate a confidence interval for a survey, experiment, or A/B test? Get the exact CI with margin of error instantly.
ToolsTDEE Calculator Online — Calculate Total Daily Energy Expenditure Free
TDEE is the most important number in nutrition — it tells you exactly how many calories you burn daily. Calculate yours instantly.
ToolsCalorie Calculator Online — Calculate Daily Calorie Needs Instantly
Not sure how many calories you should be eating daily? Calculate your personalised calorie target based on your body stats and activity level.
ToolsSpeed Converter Online — Convert km/h, mph, m/s, knots Instantly
Converting between km/h, mph, m/s and knots manually requires formulas most people don't remember. Get all speed conversions instantly.
ToolsTime Converter Online — Convert Seconds, Minutes, Hours, Days Instantly
Converting between milliseconds, seconds, minutes, hours, days and years manually is tedious. Get all time unit conversions at once instantly.
ToolsTemperature Converter Online — Convert Celsius, Fahrenheit and Kelvin Instantly
Celsius to Fahrenheit conversions trip up everyone. Here's how to convert between all three temperature scales instantly without memorising any formula.
ToolsWeight Converter Online — Convert kg, grams, pounds, ounces, stone Instantly
Converting between kilograms, pounds, ounces and stone manually is slow and error-prone. Get all weight conversions at once instantly.
ToolsLength Converter Online — Convert mm, cm, m, km, inches, feet Instantly
Need to convert between metric and imperial length units instantly? No formulas, no manual math — just paste a value and get all conversions at once.
ToolsMonth Calculator Online — Calculate Months Between Two Dates
Need to know how many months between two dates for a contract, subscription, or project? Calculate it instantly.
ToolsColor Picker Online — Pick Colors and Get HEX, RGB, HSL Values
Need a color code for your design or code? Pick any color and instantly get its HEX, RGB, and HSL values without any app.
ToolsMD5 Generator Online — Generate MD5 Hash from Any String Instantly
Need an MD5 hash for a checksum, file verification, or API signature? Generate it instantly without writing any code.