Work in m, cm or mm. Geometry, volume in m³ / liters, Ohm’s law, and dimensioned sketches.
Fill one circle value. The others are calculated automatically.
Enter radius or diameter, plus height. Used for tanks, pipes, columns, rolls and circular rooms.
Circular curve / arc. Enter any two of: radius, chord, rise (sagitta), arc length, or central angle. Typical site method: measure chord + rise to get the radius.
Convert degrees and radians, find a triangle’s third angle, or solve a right triangle / slope. Length fields use the m / cm / mm switch. Angles are always in degrees unless noted.
Pick a common shape, enter the sizes, and get perimeter, area (m²) and volume (m³).
Enter any two of voltage (V), power (W), current (I) and resistance (R). The other two are calculated. Use for DC or resistive AC (RMS values).
Rectangular tank, room, container or box. Enter height, width and length. Results show volume in cubic meters (m³) and liters (L). Units follow the m / cm / mm switch.
Choose a component, enter sizes, and draw a dimensioned sketch. Use values from the other tabs, or type them here.