How to use the Washer / Dryer Cubic Feet Calculator
- Measure the drum inside edge to inside edge across its centre. Measure depth along the drum axis.
- Enter the interior drum diameter and axial depth, choosing the correct units.
- Select Calculate. Review the result and its working; if you change an input, calculate again before copying or sharing.
Washer / Dryer formula
A cylindrical drum uses half its diameter as the radius. Volume is the circular cross-sectional area multiplied by axial depth.
Drum volume ≈ π × (interior diameter ÷ 2)² × drum depth
What the terms mean
- Interior drum diameter
- A measured length in the selected unit; it is converted to feet before volume is calculated.
- Interior drum depth
- A measured length in the selected unit; it is converted to feet before volume is calculated.
Washer / Dryer worked examples
Estimate a cylindrical washer drum
A cylindrical interior drum is 24 in in diameter and 18 in deep. Use its inside measurements.
- π × (diameter ÷ 2)² × drum depth
Answer: 4.712389 ft³. Cubic yards: 0.174533 yd³; Litres: 133.439996 L.
Estimate a larger cylindrical drum
A cylindrical drum is 28 in in diameter and 24 in deep. Compare its geometric volume with the manufacturer’s stated capacity.
- π × (diameter ÷ 2)² × drum depth
Answer: 8.552113 ft³. Cubic yards: 0.316745 yd³; Litres: 242.168881 L.
Washer / Dryer Cubic Feet Calculator FAQs
Does diameter include the outer casing?
No. Measure only the interior drum diameter.
Does more cubic footage mean a specific load weight?
No. Permitted load mass depends on the appliance and programme. Use the manufacturer’s instructions.
Measurement guide for Washer / Dryer
Measure the interior cylinder diameter and axial depth. Paddles, curved ends and manufacturer measurement methods can produce a different rated capacity.
Assumptions and limits
Drums may have curved ends, baffles or agitators. The cylindrical estimate can differ from the appliance’s tested usable capacity.
Measures a cylindrical drum envelope. Curved ends, agitators and manufacturer testing can change usable capacity.
Check your result
Check that you entered diameter rather than radius. The cylindrical estimate can differ from a manufacturer’s rated usable capacity.