Convert units by reading across a grid

Units To lays out one row for each unit and one column for each amount. Pick what you are measuring, the unit you think in and the amounts you care about, then read off every other unit at once, from the width of a hydrogen atom to a parsec.

• Type an amount the way you would say it: 6 ft, 5' 10", 70 kg or 98.6F.
• Lay out a range of amounts: every 10, powers of ten, or a list pasted from a spreadsheet.
• See at a glance which figures are exact and which are rounded.
• Star the units you use most, and share or copy the grid.

Everything is worked out in your own browser. Nothing is sent anywhere, and there is no account to make.