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Engineering numbers, worked out in your browser

Unit conversion, vessel and plate sizing, and material take-offs for a dozen trades. Nothing you type is uploaded.

12

Converters

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Every converter

All of them run in your browser — nothing is uploaded and nothing is stored.

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Image converter

Convert between JPEG, PNG and WebP, adjust quality, and resize. Handles several files at once.

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Image to PDF

Combine images into a single PDF. Reorder pages, choose A4 or Letter, and set the margin.

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Engineering unit converter

Convert force, pressure, torque, power, energy, flow and more — with every unit shown side by side.

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Tank & vessel calculator

Diameter and height from capacity, or capacity from dimensions. Dished, conical and flat ends, in metres and feet.

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MS & SS plate calculator

How many steel sheets a tank consumes, counted as rolled courses, with plate area and weight.

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Steam & boiler duty

Heat duty, boiler horsepower, equivalent evaporation and fuel burn from the steam a plant needs.

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Pump head & power

Hydraulic, shaft and motor power from flow and head, with the next standard motor frame.

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Pipe size & pressure drop

Velocity, Reynolds number and friction loss for a liquid line, with the bore checked against practice.

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Motor & gearbox selection

kW and HP, gearbox ratio, shaft torque and the design power to select a drive on.

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Heat exchanger area

Surface area from duty, temperatures and coefficient, with the LMTD worked out.

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Insulation thickness & heat loss

Thickness to hold a safe surface temperature, plus heat loss and what it costs over a year.

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Belt conveyor capacity & power

Tonnes an hour from belt width, speed and material, with the power the drive has to deliver.

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Latest articles

Worked examples, unit references, and notes on the calculations behind each tool.

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Questions

Frequently asked

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Are my files uploaded to a server?

No. Every converter on this site runs in your browser using the Canvas and File APIs. Your files never leave your device, which is also why conversion speed depends on your own hardware rather than on our servers.

Do I need an account?

No. Nothing here requires registration, and we do not charge for any of the tools.

How accurate are the engineering calculators?

The unit conversions use exact SI-defined factors. The tank and plate calculators use standard geometric formulas and are intended for estimating — confirm against your own drawings and the applicable code before ordering material.