Convert Cumecs to Acre-feet per Day (m3/s to acre-ft/day)
1 cumec (m³/s) = 70.04561994 acre-feet per day (acre-ft/day). 1 acre-ft/day = 0.01427641016 m³/s. Example: 15 m³/s = 15 × 70.04561994 = 1050.684299 acre-ft/day.
Also searched as cumecs to acre-ft/day, cumecs in acre-ft/day, cumecs into acre-feet per day, m3/s to acre-ft/day, m3/s in acre-feet per day, m3/s into acre-foot per day, cumec to acre-foot per day, m3/s to acre-feet per day converter and how many acre-feet per day in a cumec.
1 m³/s = 70.04561994 acre-ft/day
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk cumec to acre-foot per day converter to paste a column from Excel.
How to Convert Cumec to Acre-foot per Day
- 1 m³/s = 70.04561994 acre-ft/day
- 1 acre-ft/day = 0.01427641016 m³/s
- Example: convert 15 m³/s to acre-ft/day: 15 m³/s = 15 × 70.04561994 acre-ft/day = 1050.684299 acre-ft/day
Formula
acre-ft/day = m³/s × 70.04561994345
Derivation from SI units:
- 1 cumec = 1 m³/s.
- 1 acre-ft/day = 1233.48 m³ ÷ 86,400 s; 1 cusec for one day ≈ 1.98 acre-feet.
Both units are defined exactly, so the factor is exact. Cumec definition: cumec; Acre-foot per Day definition: acre-foot per day.
Worked examples
- A reading of 5 m³/s converts to 350.2280997 acre-ft/day.
5 m³/s × 70.04561994 = 350.2280997 acre-ft/day - A value of 100 m³/s is 7004.561994 acre-ft/day.
100 m³/s × 70.04561994 = 7004.561994 acre-ft/day
Cumec to Acre-foot per Day conversion table
| Cumecs (m³/s) | Acre-feet per Day (acre-ft/day) |
|---|---|
| 0.1 m³/s | 7.004561994 acre-ft/day |
| 0.5 m³/s | 35.02280997 acre-ft/day |
| 1 m³/s | 70.04561994 acre-ft/day |
| 5 m³/s | 350.2280997 acre-ft/day |
| 10 m³/s | 700.4561994 acre-ft/day |
| 50 m³/s | 3502.280997 acre-ft/day |
| 100 m³/s | 7004.561994 acre-ft/day |
| 500 m³/s | 35022.80997 acre-ft/day |
| 1000 m³/s | 70045.61994 acre-ft/day |
| 10000 m³/s | 700456.1994 acre-ft/day |
Where it's used
Cumecs are used for river and flood discharge, while acre-feet per day appear in US irrigation district deliveries. Both measure volumetric discharge of rivers, canals and water supply, so the conversion is a fixed factor.
Cumec to other water discharge units
| Conversion | 1 m³/s equals |
|---|---|
| cumec to acre-foot per day | 70.04561994 acre-ft/day |
| cumec to cusec | 35.31466672 ft³/s |
| cumec to MLD | 86.4 MLD |
| cumec to litre per second | 1000 L/s |
| cumec to cubic metre per day | 86400 m³/day |
| cumec to MGD | 22.82446532 MGD |
| cumec to MGD (imp) | 19.00534305 MGD (imp) |
Frequently asked questions
How many acre-feet per day are in 1 cumec?
1 m³/s = 70.04561994 acre-ft/day.
How do I convert cumecs to acre-feet per day?
Multiply the value in m³/s by 70.04561994. For example, 15 m³/s × 70.04561994 = 1050.684299 acre-ft/day.
Is the m³/s to acre-ft/day conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "acre-foot".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Cumecs to Acre-feet per Day (m3/s to acre-ft/day). Retrieved October 29, 2026, from https://scientificconverters.com/discharge/cumecs-to-acre-feet-per-day/
IEEE
Scientific Converters, "Convert Cumecs to Acre-feet per Day (m3/s to acre-ft/day)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/discharge/cumecs-to-acre-feet-per-day/