Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Engineering
Concrete Mix Design Calculator
Estimates the total cement mass required for a concrete pour based on volume and target strength. Use it when specifying mix proportions for slabs, columns, or foundations to meet structural and durability requirements.
Fill in the required fields to see your result.
Engineering
Gear Ratio & Speed Calculator
Calculates the output speed of a two-gear meshing pair given the driver and driven tooth counts and the input speed. Use it when selecting gear pairs for motors, gearboxes, or power-transmission drives. (For output torque, multiply input torque by the gear ratio R = drivenTeeth / driverTeeth and by mesh efficiency — see the explanation below.)
Fill in the required fields to see your result.
Key differences
| Concrete Mix Design Calculator | Gear Ratio & Speed Calculator | |
|---|---|---|
| Category | Engineering | Engineering |
| Inputs required | 2 | 3 |
| Result | Cement Required (kg) | Output Speed (RPM) |
| What it does | Estimates the total cement mass required for a concrete pour based on volume and target strength. Use it when specifying mix proportions for slabs, columns, or foundations to meet structural and durability requirements. | Calculates the output speed of a two-gear meshing pair given the driver and driven tooth counts and the input speed. Use it when selecting gear pairs for motors, gearboxes, or power-transmission drives. (For output torque, multiply input torque by the gear ratio R = drivenTeeth / driverTeeth and by mesh efficiency — see the explanation below.) |