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Calculate everything.
Fast, free unit converters, everyday calculators and holiday countdowns. Instant answers with formulas, tables and clear explanations.
- 123 units
- 31 calculators
- 34 countdowns
- 100% free, no sign-up
Common conversions
All converters →- cm to inches
- inches to cm
- kg to lbs
- lbs to kg
- celsius to fahrenheit
- fahrenheit to celsius
- cm to feet
- feet to cm
- mm to inches
- inches to mm
- meters to feet
- feet to meters
- km to miles
- miles to km
- grams to oz
- oz to grams
- inches to feet
- feet to inches
- liters to gallons
- gallons to liters
- lbs to oz
- oz to lbs
- mph to km/h
- km/h to mph
- acres to square feet
- square feet to acres
- radians to degrees
- degrees to radians
- hp to kw
- kw to hp
- meters to yards
- yards to meters
- ml to cups
- cups to ml
- mpg to l per 100km
- mbps to megabytes per second
Unit converters
Browse all →- 📏Lengthmm · cm · m · km · in
- ⚖️Weight & Massmg · g · kg · t · oz
- 🧪VolumemL · cc · L · m³ · tsp
- 🌡️Temperature°C · °F · K
- 🗺️Areamm² · cm² · m² · km² · ha
- 🚀Speedm/s · km/h · mph · kn · ft/s
- ⏱️Timens · µs · ms · s · min
- 💾Data Storagebit · B · KB · MB · GB
- 🎈PressurePa · kPa · bar · psi · atm
- ⚡EnergyJ · kJ · cal · kcal · Wh
- 📐Angle° · rad · grad · arcmin · arcsec
- 🔌PowerW · kW · MW · hp · PS
- 💪ForceN · kN · lbf · kgf · dyn
- 🔧TorqueN·m · ft·lb · in·lb · kgf·m
- ⛽Fuel Economympg · mpg (UK) · km/L · L/100km
- 📶Data Transfer Ratebps · kbps · Mbps · Gbps · kB/s
- 🚰Flow RateL/s · L/min · gpm · cfm · m³/h
Popular calculators
All 31 calculators →- 🧾Invoice GeneratorCreate and download professional PDF invoices. Free.
- %Percentage CalculatorFind X% of Y, what percent one number is of another, and percent change.
- ½Fraction CalculatorAdd, subtract, multiply and divide fractions with simplified answers.
- x̄Average CalculatorMean, median, mode, range and standard deviation of any list of numbers.
- 🎲Random Number GeneratorGenerate one or many random numbers between any minimum and maximum.
- 🎓GPA CalculatorCalculate your GPA on a 4.0 scale from letter grades and credit hours.
- 📝Final Grade CalculatorFind the score you need on your final exam to reach your target grade.
- 🏠Mortgage CalculatorEstimate your monthly mortgage payment, total interest and payoff cost.
- 💳Loan CalculatorMonthly payments and total interest for car, personal or student loans.
- 📈Compound Interest CalculatorSee how savings and investments grow with compounding and contributions.
- 🍽️Tip CalculatorWork out the tip and split the bill between any number of people.
- 🏷️Discount CalculatorFind the sale price and how much you save with a percent-off discount.
Cooking conversions
Weight chart →- all-purpose flour cups to grams
- bread flour cups to grams
- whole wheat flour cups to grams
- cake flour cups to grams
- almond flour cups to grams
- granulated sugar cups to grams
- brown sugar cups to grams
- powdered sugar cups to grams
- butter cups to grams
- water cups to grams
- milk cups to grams
- heavy cream cups to grams
Upcoming countdowns
All countdowns →- ⚓Days until Columbus Day4 days · Oct 12, 2026
- 🎃Days until Halloween23 days · Oct 31, 2026
- 🎖️Days until Veterans Day34 days · Nov 11, 2026
- 🦃Days until Thanksgiving49 days · Nov 26, 2026
- 🛍️Days until Black Friday50 days · Nov 27, 2026
- 💻Days until Cyber Monday53 days · Nov 30, 2026
- ❄️Days until Winter74 days · Dec 21, 2026
- 🌟Days until Christmas Eve77 days · Dec 24, 2026
Why UnitBerry?
Every tool on UnitBerry gives you the answer instantly, shows the formula behind it and works on any device — no sign-up, no clutter. Calculations run privately in your browser.