Work with quantities, not just numbers.
UnitSheet is the unit-aware spreadsheet for scientists, engineers, educators, and students. Cells hold quantities - value and unit together - so formulas stay dimensionally correct.
- 366 units
- 72 dimensions
- 199 functions
-
Dimensionally
correct
The problem with ordinary spreadsheets
No dimensional guardrails
Adding meters to seconds is allowed. The sheet has no idea the answer is nonsense.
Manual conversion
You maintain lookup tables, sanity checks, and unit-checking formulas by hand.
Silent failures
Wrong units can produce plausible numbers. Nothing flags that your result is meaningless.
How UnitSheet is different
Units are data
Dimensions travel with values through every formula.
=25mi / 35min → mph → 42.86mph
Automatic conversion
Same-dimension arithmetic converts in place — results follow the first term's unit.
=5m + 3ft → 5.9144m
Errors, not lies
Incompatible dimensions surface as errors, not quiet wrong answers.
=5m + 3s → #UNIT
Typical sheets
A lab recipe, a cut list, and a physics problem.
Lab recipes
A 1× PBS batch. Concentration, volume, and molar mass make the mass. Mass times price is the cost.
=137 mmol/L * 1 L * 58.44 g/mol → g → 8.01 g
=8.01 g * $80/kg → $0.64
Engineering cut lists
A workbench. Size times count times price is money. Bar stock is millimeters, priced per meter.
=2.4 m * 4 * $18.50/m → $177.60
=800 mm * 3 * $6.20/m → $14.88
Student physics
A projectile from a ledge. From a height, the farthest angle is under 45°. Time plus range is an error.
=20 m/s * COS(40°) → m/s → 15.32 m/s
=49.78 m → ft → 163.34 ft
=D5+E5 → #UNIT
A full workbook, not just a unit converter
Signed-in users get a live spreadsheet that evaluates in the browser with that same engine.
Fill a column, import a lab CSV, keep multiple sheets, name a lab unit
(1 slab = 1 in), and scan for #UNIT errors.
qty × price is money; ISO dates and instants are types.
Share a workbook with a lab partner — view or edit.
Try it in the demo workbook — no account needed
->, each unit shows that value — no
CONVERT strings.
Open the catalog in the demo workbook
The same 366 units the workbook and autocomplete use, grouped by dimension, plus currencies.
Live grid
Formula bar, multiple sheets, fill down/right, and Go To. Arrow keys, fill handle, and A1 references work the way a spreadsheet should.
CSV in and out
Import a measurement file. A header like length (m) turns bare numbers into quantities,
Amount ($) into money, and Price ($/lb) into a price.
Export cell contents, not stripped values.
Your units
Name a symbol as a scale of an existing unit (1 slab = 1 in). Then
10slab and =A1 → slab work like built-ins.
Tools → Custom units.
Money and price
$12.50 and $3.50/kg are types, not formats.
=2.5 kg * $3.50/kg is money; same-currency arithmetic just works.
Dates and times
ISO dates, times of day, and UTC instants are cell types.
=2026-09-20 + 10 d and =NOW() stay on a time axis, not text.
Share a workbook Pro Only
File → Share invites a UnitSheet account to view or edit. Viewers can open, export, and print. Editors change cells, sheets, and units. Partners see updates within about a second.
Create an account and open your first workbook
Sharing and additional capacity are the main reasons teams upgrade.
Free
$0
- 3 saved workbooks
- 5 sheets per workbook
- 50 columns × 5,000 rows per sheet
- Same calculation engine as Pro
- Cannot share workbooks
Pro
$99 / year
- 200 workbooks
- 50 sheets per workbook
- 200 columns × 20,000 rows per sheet
- Share with other Pro users (view or edit)
- Collaborators see updates within about a second
Already have one? Log in