About engineering conversions
Engineering converters bridge SI, imperial and industry-specific units used in mechanical, civil, chemical and aerospace work. Pressure in psi, bar, kPa or atm; energy in joules, BTU or kWh; force, torque, viscosity — all expressed against their canonical reference. Use these tools to verify spec sheets, translate datasheets between metric and imperial markets, or work through textbook problems without manual factor lookups.
All engineering tools
Every converter and calculator in this hub, ready to launch.
Popular engineering conversions
The most-searched conversion pairs — one tap straight to the answer.
When you'll reach for these
Practical scenarios where this hub shines.
Reading datasheets
Translate German bar pressure ratings to US psi without flipping tabs.
CAD & spec verification
Cross-check imperial drawings against metric tooling instantly.
Field measurements
Convert sensor readings between SI and shop-floor units on the go.
Key formulas
- Bar → psi
psi = bar × 14.50377 - kWh → MJ
MJ = kWh × 3.6
Common mistakes
Confusing gauge vs absolute pressure
psi vs psia matters — gauge readings ignore atmospheric pressure (~14.7 psi).
Ignoring significant figures
Carrying 6 decimals through a chain of conversions implies precision your input never had.
Did you know?
1 horsepower = 745.7 watts
James Watt picked the number from draft-horse work measured at a brewery in 1782.
Frequently asked
What is the difference between bar and psi?
Both measure pressure. 1 bar equals 100,000 pascals (≈ 14.5038 psi). Bar is common in Europe and the auto industry; psi is dominant in North America.
Is 1 atm exactly 101,325 Pa?
Yes — the standard atmosphere is defined as exactly 101,325 pascals by international convention.
You may also like
Tools from neighboring hubs that pair well with this one.
Explore neighbouring hubs
Categories that pair naturally with this one — and the tools to start with.
Get the best new converters & calculators.
Hand-picked tools, useful conversion tips, no spam — unsubscribe in one click.
Your next conversion is one tap away.
Trending tools, your recent picks, and smart suggestions — curated, not cluttered.