Universal Volume Unit Converter
Choose the unit your figure is already in, type the number, and every other unit updates instantly, pick a different "from" unit at any time and everything recalculates.
Pick the unit your figure is already in, type the number, and every other unit on the homepage's seven-column conversion chart updates at once. Change the "from" unit at any point and everything recalculates instantly, there's no fixed direction to this converter.
One Figure, Seven Units
This page exists for the moment when you already have a volume, a manufacturer's spec, a number from a supplier's invoice, a result from one of this site's other calculators, and just need it read back in a different unit. That's a different job from the homepage calculator, which starts from three physical dimensions and works up to a volume from scratch. If you're still at the measuring stage, start there; if you already have a number and just need it translated, this page skips straight to that.
All seven units, cubic feet, cubic yards, cubic meters, cubic inches, US gallons, US quarts and liters, are calculated from exactly the same factors as the homepage's conversion chart, so nothing here will ever disagree with a figure checked there.
Reference Table
Four reference rows, matching the same values used throughout this site.
| Cubic Feet | Cubic Yards | Cubic Meters | Cubic Inches | US Gallons | US Quarts | Liters |
|---|---|---|---|---|---|---|
| 1 ft³ | 0.0370 | 0.0283 | 1,728 | 7.4805 | 29.9221 | 28.3168 |
| 10 ft³ | 0.3704 | 0.2832 | 17,280 | 74.8052 | 299.2208 | 283.1685 |
| 27 ft³ | 1.0000 | 0.7646 | 46,656 | 201.9740 | 807.8961 | 764.5546 |
| 100 ft³ | 3.7037 | 2.8317 | 172,800 | 748.0519 | 2,992.2078 | 2,831.6847 |
Reading Numbers Across Very Different Scales
The 27 row above is worth lingering on, because it's the one place all seven units land on numbers most people already recognize: 27 cubic feet is exactly one cubic yard, about 0.76 cubic meters, 46,656 cubic inches, just over 200 US gallons, and roughly 765 liters. That spread, from a two-digit figure in cubic meters to a five-digit figure in cubic inches, is a useful reminder that a "big number" and a "small number" can describe the exact same physical volume, and the only thing that changed is which unit is doing the counting. Cubic inches will always produce the largest raw number for a given volume, because it's the smallest unit on the list; cubic meters will produce the smallest, because outside water measurement it's the largest unit here. Neither number is more "correct" than the other.
This matters practically when you're sanity-checking a figure someone else calculated. If a supplier's invoice says a delivery was "2,831,684.7" cubic inches, that's not a typo or an inflated number, run it through this converter and it's exactly 1,639 cubic feet, or about 60.7 cubic yards, a perfectly ordinary bulk delivery that just happens to look enormous when forced into the smallest unit on the chart.
Worked Examples in Both Directions
Example 1, a spec sheet gives a tank's capacity in liters:
A water heater rated at 189 liters. Set the "from" unit to Liters, enter 189.
Reading the cubic feet column: 6.673 ft³, close to the 6 ft³ "extra-large" moving-box reference used elsewhere on this site, useful for picturing the size at a glance.
Example 2, you know cubic yards and need cubic inches for a customs form:
A 3.5 yd³ crate. Set the "from" unit to Cubic Yards, enter 3.5.
Reading the cubic inches column: 163,296 in³, the figure some customs and freight paperwork specifically asks for over any other unit.
Both examples use the same converter in opposite directions, which is the entire point of building it around a single adjustable "from" unit rather than a fixed pair like most two-field converters, you're never stuck picking the wrong starting side and having to clear the form to switch.
Single-Unit Pages, If That's All You Need
If you only ever need one specific conversion, feet to yards, or feet to meters, a dedicated page can be faster than picking through seven columns each time. The feet-to-yards calculator and cubic meters calculator both handle their single conversion with a slightly simpler interface than this page's full seven-unit spread, while the gallons calculator adds the Imperial gallon figure this page's seven-unit set leaves out. Think of this page as the one to bookmark if you regularly work across several units in the same session, and the single-unit pages as the faster path when you already know exactly which conversion you need before you start typing.
One practical habit worth adopting: when you're about to quote a volume to someone else, a supplier, a customs broker, a contractor, convert it to whichever unit they actually use before sending it, rather than sending your own preferred unit and letting them convert it. It removes an entire category of miscommunication, and this page is built specifically to make that translation take a few seconds rather than a search for a conversion factor.
Rounding and Precision Across Units
This calculator carries four decimal places on every unit, matching the precision already established across this site's other calculators and tables. That's more precision than almost any real-world use needs, no supplier is going to quote you a ten-thousandth of a gallon, but keeping the full figure on screen avoids compounding rounding errors if you're chaining several conversions together (converting cubic feet to liters, then that liter figure into a different calculation elsewhere). Round to whatever precision your actual task calls for only at the very last step, not partway through a multi-step calculation.
This also explains why a figure you calculate here might differ in the third or fourth decimal place from a number printed on an old spec sheet or found in a general reference table: many published tables round their conversion factors themselves (using 35.3 instead of 35.315 for cubic meters, for instance), which compounds into a larger discrepancy at bigger volumes even though both numbers are "correct" to their own stated precision. When in doubt, recalculate from the base dimensions rather than trusting a pre-rounded published factor.
Keeping a Consistent Unit Across a Project
On any project involving more than one supplier or document, picking a single unit early and converting everything to it, rather than juggling several suppliers' preferred units side by side, cuts down on the arithmetic mistakes that come from mentally converting on the fly. This page is built to make that consistency easy: convert every figure you receive to your chosen unit the moment you get it, and the whole project stays comparable without needing to re-derive a conversion factor from memory each time a new number comes in.
Frequently Asked Questions
When should I use this converter instead of the homepage calculator?
Use the homepage calculator when you're starting from three dimensions and need a volume. Use this converter when you already have a volume figure, from a spec sheet, an invoice, or another calculator, and just need it expressed in a different unit.
Why does changing the "from" unit recalculate everything instead of just adding a new row?
Every other unit's value depends entirely on which unit your original number is in, changing that assumption without recalculating the rest would leave five wrong numbers on the screen instead of one updated one. This reactive-input approach is the same one used across every calculator on this site.
Are the seven units here the same ones on the homepage's conversion chart?
Yes, this page uses the identical factors as the homepage's seven-column chart, so a figure checked on either page will always agree with the other. That consistency means you can start a calculation on one page and finish it on the other without any figures disagreeing.
Does this converter handle Imperial gallons as well as US gallons?
This page's seven units match the homepage chart exactly, which uses US gallons, for the Imperial gallon figure specifically, the gallons calculator shows US and Imperial side by side. Checking both figures matters most for older tanks and equipment manufactured to Imperial specifications.