Milliliters to Acre-feet (mL to ac⋅ft)

1 milliliter equals 8.107131938×10⁻¹⁰ acre-feet (rounded).

1 milliliter = 8.107131938×10⁻¹⁰ acre-feet

How to convert milliliters to acre-feet

To convert milliliters to acre-feet, multiply the number of milliliters by 8.107131938×10⁻¹⁰. The factor is rounded to 10 significant digits. To go the other way, multiply acre-feet by 1,233,481,838 (rounded).

acre-feet = milliliters × 8.107131938×10⁻¹⁰

Example: 10 milliliters = 8.107131938×10⁻⁹ acre-feet.

Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.

About these units

Milliliter (mL)

Metric (SI)Current unit

One thousandth of a liter, or exactly 1 cubic centimeter. Used for medicine, cooking and small containers.

Milliliters inherit everything from the liter, since the prefix simply means one thousandth. Because the liter is a cubic decimeter, a milliliter works out to exactly one cubic centimeter, a coincidence the metric system built in on purpose so that volume, length and mass interlock. One milliliter of water has a mass of about one gram, so a dosing syringe, a kitchen scale and a measuring jug can all be checked against one another.

Today milliliters dominate wherever small amounts must be measured precisely: medicine, flavorings, perfume, shampoo and the fine print on drink labels. Spelling is a mild regional split, with uppercase mL preferred in the United States, Canada and Australia and lowercase ml common in the UK and Europe. For scale, a US teaspoon is just under 5 mL, a US tablespoon is about 14.8 mL, and the US nutrition-label cup is exactly 240 mL, so one such cup is 240 of these tiny units.

1 milliliter = 0.001 liters (exactly).

Sources: Wikipedia: Litre; NIST SP 811, Appendix B.8: conversion factors for volume; 21 CFR 101.9: nutrition labeling household measures

Acre-foot (ac⋅ft)

US customaryTraditional unit (still used in some regions)

The volume of water that covers one acre to a depth of one foot: 43,560 cubic feet or about 1,233.48 cubic meters. Used for reservoirs and irrigation in the US.

Water engineers in the western United States took the acre, a land measure of 43,560 square feet that began as a strip one chain by one furlong, and gave it a depth of one foot to describe water. The result, the acre-foot, covers 43,560 cubic feet, which is about 1,233.48 cubic meters or roughly 1.23 million liters. In US gallons it comes to about 325,851.

The unit is used for reservoirs, canals, aqueducts, irrigation allotments and river flows, where the volumes are too large for gallons to be comfortable. A common planning rule treats one acre-foot per year as the water use of a suburban household, although Santa Fe households average closer to a quarter of that.

The size depends slightly on which foot is used. The figure used here follows the international foot of exactly 0.3048 m. The older US survey foot makes the unit about 0.0006 percent larger, a gap that matters little in practice. Most other countries state such volumes in cubic meters, megaliters or cubic kilometers.

1 acre-foot = 1,233,481.838 liters (approximately).

Sources: Wikipedia: Acre-foot; Wikipedia: Acre

Related conversions

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