🔬 Science Calculators UK
Science and unit conversion calculators for converting between measurement systems quickly and accurately — essential for coursework, cooking, DIY and everyday cross-unit conversions.
The UK famously mixes metric and imperial units in everyday life — recipes in grams, human height in feet and inches, fuel efficiency in miles per gallon — which makes reliable unit conversion a genuinely useful everyday tool, not just a science-class exercise. Getting a conversion factor slightly wrong compounds fast in anything from a recipe to a construction measurement.
This category is built to be a fast, accurate reference for the length, mass, volume and other unit conversions that come up constantly, whichever direction you need to go.
Beyond conversions, several tools here cover core physics and chemistry formulas — wave frequency, escape velocity, moment of force, dilution using C1V1=C2V2 — using SI units alongside the everyday units UK students and hobbyists actually encounter, so the working is easy to check against a textbook or exam board formula sheet.
All Science calculators
Unit Converter
Convert length, weight and temperature between metric and imperial.
Pounds (lbs) to Stone Calculator
Convert pounds to stone and pounds, or stone and pounds back to lbs, instantly.
KG to Stone Calculator
Convert kilograms to stone and pounds, including decimal kg values.
Pints to ML Calculator
Convert pints to millilitres — UK/imperial pint or US pint.
Litres to Gallons Calculator
Convert litres to UK (imperial) gallons and US gallons side by side.
Grams to ML Calculator
Convert grams to millilitres by ingredient density — water, flour, milk, sugar and more.
KG to Lbs Calculator
Convert kilograms to pounds and back, both ways, instantly.
CM to Feet Calculator
Convert centimetres to feet and inches, or feet and inches back to cm.
CM to Inches Calculator
Convert centimetres to inches and inches back to cm, instantly.
Fahrenheit to Celsius Calculator
Convert Fahrenheit to Celsius and Celsius to Fahrenheit, both ways.
KM to Miles Calculator
Convert kilometres to miles and miles back to km, instantly.
Inch to MM Calculator
Convert inches to millimetres and mm back to inches, instantly.
Stone to KG Calculator
Convert stone and pounds to kilograms, or kg back to stone and pounds.
Earth Curvature Calculator
Calculate how much the Earth curves over a given distance.
Wavelength & Frequency Calculator
Convert between wavelength and frequency for any wave.
Resistor Colour Code Calculator
Decode resistor colour bands into resistance values.
Dilution Calculator (C1V1=C2V2)
Work out dilution volumes for a target concentration.
Moment of Force Calculator
Calculate the turning moment of a force about a pivot.
Escape Velocity Calculator
Calculate escape velocity for a given mass and radius.
Frequently asked questions
Why does the UK use both metric and imperial units?
The UK officially adopted the metric system decades ago for most contexts (science, most retail), but imperial units (miles, pints, feet and inches for height) remain in everyday and legal use in specific areas — road distances and speed limits are a well-known example.