Shop & equipment calculators
Fuel mix, torque, drill speed, gear ratios, steel weight, hydraulic cylinder force — and markup and margin for pricing the job. Every one works in feet and inches or in metric — flip the switch at the top and the numbers you have typed convert with it.
7 tools
- 2-stroke fuel mix oil for a gas ratio like 50:1
- Torque conversion ft·lb, in·lb, N·m & kgf·m
- Drill speed RPM from cutting speed & diameter
- Gear ratio ratio, output speed & torque
- Steel weight weight of bar, plate, tube or angle
- Cylinder force push & pull force from bore & pressure
- Markup & margin price a job from cost and markup or margin
Nothing in this drawer matches. Try the full index, which searches every tool.
Which one do I need?
For the shop and the machine: mix it, torque it, spin it at the right speed, and know what the steel weighs before you lift it.
- Oil for a two-stroke mix? 2-stroke mix calculator →
- ft·lb to N·m? Torque conversion calculator →
- Spindle RPM for a drill or cutter? Drill speed calculator →
- How heavy is that bar, plate or tube? Steel weight calculator →
The other drawers
- Concrete & masonry
- Framing & carpentry
- Site & landscape
- Finishes & interior
- Measure & layout
- Electrical
- Plumbing & HVAC
- Conversions
- Every tool
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Calculators that fit your work — by email, optional
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