Free Online Calculators
Percentages, date and time zone differences, unit and clothing size conversion, yarn and curtain quantities, party portions — all calculated in your browser.
- Percentage CalculatorCalculate percentages, ratios and percent change instantly.
- Date CalculatorDays between dates, add days, and D-day countdown.
- Time Zone ConverterSee what a given time is in other parts of the world, with daylight saving handled for the date you pick rather than for today.
- Unit ConverterConvert length, weight, volume, area and temperature — plus height in feet and inches, cups to grams by ingredient, and oven temperatures.
- Cake Pan ConverterSwap one cake pan for another and get the exact batter multiplier, plus baking time guidance for the new depth.
- Knitting & Crochet Gauge CalculatorTurn your gauge swatch into a stitch count, resize a pattern written for a different gauge, and estimate how much yarn a project needs.
- Party Food & Drink CalculatorHow much food, drink and ice to buy for a party — protein, sides, appetiser counts and bottle counts from your guest list and the length of the event.
- Curtain Fabric CalculatorWork out widths, cut length and total metres from rail width, fullness and fabric width — including the pattern-repeat surcharge and a railroaded-cut check.
- Shoe & Clothing Size ConverterMeasure your foot in centimetres, or one body measurement, and read JP, KR, EU, UK, US and BR shoe sizes with DE, FR and IT clothing sizes at once.