Formula
Cubic yards = cubic feet ÷ 27. Cubic metres = cubic feet × 0.028316846592. Order cubic yards = cubic yards × (1 + allowance percent ÷ 100). Optional estimated cost = order cubic yards × price per cubic yard.
Measurement & Unit Conversion
Cubic Feet to Cubic Yards Calculator
Convert cubic feet to cubic yards for concrete, mulch, gravel, soil, shipping or classroom volume notes, with allowance, cubic-metre cross-checks and a printable job record.
Calculator
Working calculator
Live result3 cu yd81 cu ft ÷ 27 = 3 cu yd exact · 2.293665 m³ · order volume 3.3 cu yd with 10% allowance
Formula used
Cubic yards = cubic feet ÷ 27. Cubic metres = cubic feet × 0.028316846592. Order cubic yards = cubic yards × (1 + allowance percent ÷ 100). Optional estimated cost = order cubic yards × price per cubic yard.
This is the method behind the answer, so the result can be checked rather than simply trusted.Visual grid
This result measures part of the space you live in
Length, area, volume and material estimates are grid problems too: measure the space, account for edges and allowances, then turn the pattern into a number you can use.
Micro-timehours, minutes, shiftsHuman scaledays, weeks, projectsMacro-timemonths, years, calendars
Measured output3 cu yd
Space calculations turn a real surface, room, run or volume into cells, edges and allowances that can be quoted, ordered or checked.
CalculationTime
Cubic Feet to Cubic Yards Calculation Report
3 cu yd81 cu ft ÷ 27 = 3 cu yd exact · 2.293665 m³ · order volume 3.3 cu yd with 10% allowance
Inputs
- Volume
- 81 cu ft
- Waste / allowance
- 10 %
- Yard rounding increment
- 0.01 cu yd
- Optional unit price
- 0 per cu yd
Method
Cubic yards = cubic feet ÷ 27. Cubic metres = cubic feet × 0.028316846592. Order cubic yards = cubic yards × (1 + allowance percent ÷ 100). Optional estimated cost = order cubic yards × price per cubic yard.
- For 81 cubic feet, cubic yards = 81 ÷ 27 = 3.0000 cu yd. With a 10% allowance, order volume = 3 × 1.10 = 3.3000 cu yd. The metric cross-check is 81 × 0.028316846592 = 2.2927 m³ before allowance.
Assumptions
- The input is already a volume in cubic feet, not a length, area or depth measurement.
- The conversion uses 1 cubic yard = 27 cubic feet because 1 yard = 3 feet and 3 × 3 × 3 = 27.
- The cubic-metre cross-check uses the international-foot basis: 1 cubic foot = 0.028316846592 cubic metres.
- Allowance is shown separately from measured volume so ordering judgement does not hide inside the unit conversion.
Notes
Use this space on the printed report for client, supplier, classroom, job-location, measurement, quote or approval notes.
Worked example
For 81 cubic feet, cubic yards = 81 ÷ 27 = 3.0000 cu yd. With a 10% allowance, order volume = 3 × 1.10 = 3.3000 cu yd. The metric cross-check is 81 × 0.028316846592 = 2.2927 m³ before allowance.
Professional note
Master’s Tip: convert the measured volume first, then add allowance as a separate line. That makes a quote note easier to audit when concrete, mulch, gravel or soil quantities are rounded to supplier ordering increments.
Regional and unit assumptions
Standard or basis: international-foot volume conversion where 1 cubic yard = 27 cubic feet and 1 cubic foot = 0.028316846592 cubic metres. This is a measurement, quote-note and worksheet calculator, not a supplier quote, engineering approval or compaction guarantee.
Assumptions and limitations
- The input is already a volume in cubic feet, not a length, area or depth measurement.
- The conversion uses 1 cubic yard = 27 cubic feet because 1 yard = 3 feet and 3 × 3 × 3 = 27.
- The cubic-metre cross-check uses the international-foot basis: 1 cubic foot = 0.028316846592 cubic metres.
- Allowance is shown separately from measured volume so ordering judgement does not hide inside the unit conversion.
- Supplier rules, compaction, moisture, truck minimums, bag yields, tax, delivery charges and local construction requirements may change the final order.
Methodology & Accuracy
How this calculator is checked
CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.
Formula used
Cubic yards = cubic feet ÷ 27. Cubic metres = cubic feet × 0.028316846592. Order cubic yards = cubic yards × (1 + allowance percent ÷ 100). Optional estimated cost = order cubic yards × price per cubic yard.
Standard or basis
Standard or basis: international-foot volume conversion where 1 cubic yard = 27 cubic feet and 1 cubic foot = 0.028316846592 cubic metres. This is a measurement, quote-note and worksheet calculator, not a supplier quote, engineering approval or compaction guarantee.
Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.Master's Tip
Master’s Tip: convert the measured volume first, then add allowance as a separate line. That makes a quote note easier to audit when concrete, mulch, gravel or soil quantities are rounded to supplier ordering increments.
Related calculators
Questions
How do I convert cubic feet to cubic yards?
Divide cubic feet by 27. A cubic yard is 3 ft × 3 ft × 3 ft, so it contains 27 cubic feet.
How many cubic yards is 81 cubic feet?
81 cubic feet is 3 cubic yards because 81 ÷ 27 = 3.
Should I add waste before or after converting to cubic yards?
Either order gives the same arithmetic if the percentage is the same, but it is clearer to convert the measured volume first and show allowance as a separate line.
Is cubic yards the same as yards?
No. Cubic yards measure volume. Yards measure length. A cubic yard is a three-dimensional volume equal to 27 cubic feet.
What should I print for a cubic-foot to cubic-yard record?
Print the cubic-foot input, cubic-yard result, allowance, rounding basis, cubic-metre cross-check, optional price, formula, assumptions, page URL, date and job notes.
Calculation note
Cubic-foot to cubic-yard conversion is a volume bridge between small measured dimensions and larger material ordering units. It is especially common when a job is measured in feet but quoted by the cubic yard.
A cubic yard is a three-foot cube
Because one yard equals three feet, a cube that is one yard wide, one yard long and one yard high contains 3 × 3 × 3 cubic feet. That is why the conversion divisor is 27.
Material orders need an audit trail
Concrete, soil, mulch and gravel are often measured from dimensions but ordered in cubic yards. A useful record keeps measured volume, allowance and supplier rounding separate.
Metric cross-checks reduce handoff mistakes
Showing cubic metres beside cubic yards helps when drawings, suppliers or classrooms use SI units. The cross-check should be labelled as a conversion, not a different measurement.