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Measurements & Conversions

Cubic Feet to Cubic Metres Calculator

Convert a volume in cubic feet into cubic metres, for ordering concrete, fill and skips against a metric supplier.

  • Answers as you type
  • Every formula cited
  • Calculated in your browser
SettingsSettings for this calculationUS
Market
Imperial · sales tax
The volume in cubic feet.

Cubic feet is the unit a small volume gets measured in before anybody decides what to order in: a slab worked out as area by thickness, the void behind a retaining wall, a bagged-mix yield printed on the sack. Anything large enough to arrive on a lorry is then ordered in cubic yards or cubic metres, which is where this conversion sits.

Volume

2.832 m³

High confidence

1 ft = 0.3048 m exactly, so 1 ft³ = 0.3048³ = 0.028316846592 m³. Exact by definition. Round up to the supplier's increment after converting, not before.

Cubic feet entered
100 ft³
Cubic metres
2.83 m³
Litres
2,831.68 L
Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

  • NIST SP 811, Appendix B — 1 ft³ = 0.02831685 m³
  • International yard and pound agreement, 1959 — the foot is exactly 0.3048 m

Inputs used

Volume (ft³)
100

Intermediate steps

Cubic feet entered
100 ft³
Cubic metres
2.83 m³
Litres
2,831.68 L
Final result2.83 m³

Confidence note: 1 ft = 0.3048 m exactly, so 1 ft³ = 0.3048³ = 0.028316846592 m³. Exact by definition. Round up to the supplier's increment after converting, not before.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.

Sources checked 2026-09-12 · v1.0.0

Regulatory standards & verification citations2
  1. NIST SP 811, Appendix B — 1 ft³ = 0.02831685 m³
  2. International yard and pound agreement, 1959 — the foot is exactly 0.3048 m
Cite this page

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

The catalogue already carried cubic feet to cubic yards and cubic yards to cubic metres, which meant this conversion was available as two hops and as no page at all. Two hops is where rounding creeps in and where the decimal goes missing, and the direct step is common enough on its own to deserve the page: a volume worked out in feet because that is how the thing was measured, an order placed in metres because that is what the supplier sells. The litre row is deliberate — for tanks, sumps and anything holding water, litres are the unit the capacity will eventually be discussed in, and carrying it here saves the third hop.

How to calculate cubic feet to cubic metres in 2 steps

  1. Volume (ft³)The volume in cubic feet.
  2. VolumeThe tool computes the volume from those figures and shows the formula, its sources, and a confidence rating alongside it.

Cubic Feet to Cubic Metres at common values

Page defaults, not your figures above.

Volume (ft³)Volume (m³)
100.283
200.566
501.42
1002.83
2005.66
50014.2
1,00028.3

Frequently asked questions

How many cubic feet are in a cubic metre?
35.3147. It is the number worth memorising in this family, because it is the one that converts a delivered metric load back into the unit a small measurement was taken in. Its reciprocal, 0.0283, is harder to hold and easier to misplace a decimal in.
Should I order the exact converted figure?
No. Ready-mix is supplied in increments — commonly 0.25 m³ — and the waste allowance matters more than the conversion's precision. Convert, then round up to the supplier's increment, then add the allowance the pour deserves: more for a slab on uneven sub-base, less for a form you have measured twice.
Why does a bag of mix yield so little?
Because the yield is the volume after mixing, not the volume of the dry material. An 80 lb bag yields about 0.6 ft³, which is 0.017 m³, so a cubic metre needs roughly sixty of them — the calculation that usually ends the argument about bags against a ready-mix delivery.
Is a cubic foot of soil the same before and after digging?
No, and the difference is large. Excavated material bulks up by roughly a fifth to a third depending on the soil, so a hundred cubic feet of ground becomes a hundred and twenty-five or more cubic feet to cart away. Convert whichever figure you actually need and be explicit about which one it is.
Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — a confirmed fix gets a permanent check of its own, so the same mistake cannot come back.