Your numbers know something you don't.
Retirement projections, mortgage and loan repayments, property comparisons across countries, grades, and every unit conversion. Put your own numbers in and each one surfaces what the headline figure hides: the real cost, the fair comparison, the part that changes your decision. For instance:
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Unit converter
Type a conversion the way you would actually say it, and get the answer, every equivalent unit, and a real sense of how big that is. Type it, say it, or pick it from a list. Nothing is sent anywhere.
Listening… say something like "26 miles to km"
Prefer to pick from a list?
More things your numbers haven't told you
Each of these started as someone's real question - and the answer turned out to be worth knowing.
Money
Did that raise actually beat inflation?
4.04% → 0.62%
$85,000 to $92,000 looks like a solid rise. Against 3.4% inflation it is worth 0.62% a year
School
Can I still pass if I bomb the final?
94.7% needed
exactly what the final exam has to be to hit a target grade - or the honest answer when it is not reachable
Home
How many boxes of tile do I actually need?
9 boxes, not 8
length × width says 8. Add real wastage and an L-shaped floor and you are a box short
Travel
What would my month actually cost there?
your spend vs theirs
rent, groceries, transport and the rest, side by side in one currency - and honest about which cities have data worth trusting
Kitchen
How long does this go in the air fryer?
375°F, 24 min
from a 400°F, 30 min oven recipe - not a rough guess
Daily Life
What does this drive actually cost each of us?
$11.06 / person
380-mile trip, real fuel cost, split four ways
Recent (this tab only)
clear
How it actually works
Six small decisions that add up to something that feels obvious once you've used it.
Input
Type it like you'd say it out loud. Fractions, casual phrasing, and “how many” questions all work.
Output
Every unit shown at once. Tap any row to make it the new target.
Meaning
Every result anchored to something real, like a marathon, a DVD, or a Big Mac.
Ambiguity
Regional differences flagged automatically, with every reading shown side by side.
Precision
Exact defined ratios, adjustable from 2 significant figures to 12.
Factors, not approximations. Conversions use exact legal definitions where they exist (the inch is 25.4 mm by definition, the pound is 0.453 592 37 kg, the US gallon is 3.785 411 784 L), applied at double precision and rounded only for display. Temperature and fuel economy use their proper non-linear formulas.
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© 2026 UnitMojo. Every figure here is checked against a primary source and covered by automated tests, but this site is maintained by a small team and mistakes are still possible. Questions, corrections and suggestions are all welcome - get in touch .