/ Tools · Free & live

Engineering tools, free in your browser.

We build the calculators we needed on site — and give them away. No login, no install, no vendor lock-in. Use them, share them, take them offshore.

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USE CASES
  • · Field engineers checking sling angle
  • · Rigging supervisors verifying capacity
  • · Lift engineers running crane utilisation
  • · Auditors reviewing existing plans

More free calculators.

Every tool below runs entirely in your browser — no server, no data leaves your device.

LIVE

JMR Lifting Calculator

Sling tension, spreader beam sizing, crane utilisation, and rigging register — engineered inside your browser. Works offline once loaded.

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LIVE

MU Crane Utilization

Load-radius crane utilisation calculator with dynamic amplification factor, off-lead angle correction, and configurable SWL curve.

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LIVE

MU Piping Calculator

ASME B31.3 piping calculations — wall thickness, hydrotest pressure, thermal expansion, support spacing, and formula library.

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LIVE

Kruvi Toolbox

50+ browser-based engineering utilities: unit converters, safety calculators, weight estimators, permit templates. No install, no login.

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COMING SOON

MU Piping App

Piping calculations on Android — take the calculator into the field. Play Store link coming soon.

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COMING SOON

MU Lifting App

Lifting calculator on Android — sling tensions, load charts, rigging register offline. Play Store link coming soon.

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Want a calculator we haven't built yet?

Tell us the formula, the inputs, the output — if it is useful, we will build it and give it away.

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Contact · JMR Lifting

Bring us the lift that keeps you up at night.

Independent lifting engineering consultancy. We plan, calculate, review or generate — whichever your project needs. Response within 24 hours, worldwide.

Send us the vessel drawing, the constraints, the site — we will come back with a first engineering assessment inside one working day. If the lift is critical, we brief you on the phone before we write anything.

Confidentiality assumed on every enquiry.