Calcver collects the small calculations that interrupt a working day — converting kilobytes to megabytes before an upload, turning a hex colour into RGB values, or working out how many cubic yards of concrete a slab needs — and puts them all in one place. Each one is a single page that loads fast and does one job properly.

Everything runs in your browser, so results appear as you type and nothing you enter is uploaded or stored. There is no account to create, no limit on how often you use a tool, and no cost. Pick one below and start straight away.

All 24 tools

Converters

KB → MB — Kilobytes and megabytes, with a binary/decimal factor toggle.
DPI converter — Pixels to inches, cm and mm at any DPI — 72, 96, 150 or 300.
cm → inches — Centimeters to inches with a handy reference chart from 1 to 100 cm.
mL → grams — Millilitres to grams by ingredient, using each substance's density.
kPa → psi — Kilopascals to psi and back, with a tire-pressure reference scale.
Acres → sq ft — Acres and square feet both ways, with square metres and hectares.
Roman numerals — Numbers to Roman numerals and back, with a live symbol breakdown.
Binary → decimal — Base-2 and base-10 both ways, with per-bit cells, hex and octal.
Hex → RGB — Hex to RGB and HSL, with a live swatch, channels and shades.
mm → inches — Millimeters to inches and back, with a 1–200 mm reference chart.
inches → cm — Inches to centimeters and back, with a 1–36 inch reference chart.
kg → lbs — Kilograms to pounds and back, with a 1–150 kg reference chart.

Calculators

Gravel calculator — Cubic yards, tons and cubic metres of gravel from length, width and depth.
Mulch calculator — Cubic yards plus 2 cu ft and 3 cu ft bag counts from length, width and depth.
Deck board calculator — Boards, rows and linear feet for a deck, with a waste allowance.
Concrete calculator — Cubic yards, cubic feet and bag counts for a concrete slab.
Paver calculator — How many pavers your patio needs, with a built-in waste allowance.
Day I was born — Find the weekday you were born on from your date of birth.
Age calculator — Exact age in years, months and days, plus total months, weeks and days.
Snow day calculator — A playful estimate of your odds of a snow day tomorrow.

Generators

Random team generator — Paste names, choose a team count, and shuffle them into fair random teams.
Random number wheel — Set a min and max, spin the wheel, and draw a fair random integer.
Random color generator — Generate a random colour with HEX, RGB and HSL values plus a 5-swatch palette.
Fake address generator — Random fictional US addresses with name, street, city, state, ZIP and phone.

Ready when you are.

No install, no account. Open a tool and start in seconds.

Browse all tools →