Online calculator for converting flow rates between liters per second (L/s, LĀ·sā»Ā¹) and cubic meters per day (mĀ³/day, m3/d, cmd). It uses exact SI relationships (1 mĀ³ = 1000 L; 1 day = 86 400 s), giving precise engineering results suitable for hydraulics, water supply, and wastewater calculations.
Liters per Second (L/s) to Cubic Meters per Day (mĀ³/day, cmd) Converter
Enter a value in the field below and press the button
Liters per Second (L/s)
Result in Cubic Meters per Day (mĀ³/day, cmd)
How to use
- Enter a value in the Liters per Second field and press Convert.
- Adjust Decimal Places (0ā10) to control rounding in the result.
- Copy Result copies the current value to your clipboard.
- Swap opens the reverse calculator (cmd ā L/s).
- Clear All resets inputs and the calculation trace.
- Review the calculation trace to see the exact factor and substitution used.
Definitions of measurement units
Liter per second (L/s, LĀ·sā»Ā¹) is a derived SI flow-rate unit expressing one liter of volume passing each second. The liter (L) is a unit accepted for use with the SI, defined as 1 L = 1 dmĀ³ = 0.001 mĀ³. Being per second ties the rate to the SI base unit of time (second).
1 L/s = 86.4 mĀ³/day (cmd). For cross-system context: 1 L/s = 0.001 mĀ³/s.
Cubic meter per day (mĀ³/day, m3/d, cmd) is a common water-industry flow-rate unit expressing cubic meters per 24-hour day. The cubic meter (mĀ³) is the SI unit of volume; the day (d) is a non-SI unit accepted for use with the SI (1 day = 86 400 s).
1 cmd = 0.011574074074ā¦ L/s (exactly 1/86.4 L/s). For cross-system context: 1 cmd = 1 mĀ³/86 400 s ā 1.1574074Ć10ā»āµ mĀ³/s.
Conversion formula
From first principles: 1 mĀ³ = 1000 L and 1 day = 86 400 s. Therefore L/s Ć (86 400 s/day) Ć· (1000 L/mĀ³) = 86.4 mĀ³/day. Conversely, cmd Ć (1000 L/mĀ³) Ć· (86 400 s/day) = 0.011574074074ā¦ L/s.
Sources: literācubic meter relation (1 L = 1 dmĀ³ = 10ā»Ā³ mĀ³) ā NIST: SI Units and prefixes.
Conversion table (L/s ā mĀ³/day)
| L/s | mĀ³/day (cmd) |
|---|---|
| 0.10 | 8.64 |
| 0.20 | 17.28 |
| 0.50 | 43.20 |
| 1.00 | 86.40 |
| 1.50 | 129.60 |
| 2.00 | 172.80 |
| 3.00 | 259.20 |
| 5.00 | 432.00 |
| 7.50 | 648.00 |
| 10.00 | 864.00 |
| 12.00 | 1,036.80 |
| 15.00 | 1,296.00 |
| 20.00 | 1,728.00 |
| 25.00 | 2,160.00 |
| 30.00 | 2,592.00 |
| 40.00 | 3,456.00 |
| 50.00 | 4,320.00 |
| 60.00 | 5,184.00 |
| 80.00 | 6,912.00 |
| 100.00 | 8,640.00 |
Real world examples
- Lab dosing pump rated 1.00 L/s ā 86.40 mĀ³/day (continuous service).
- Skid-mounted RO unit rated 20.00 mĀ³/day ā 0.23148 L/s.
- Package WWTP module rated 100.00 mĀ³/day ā 1.15741 L/s.
- Small municipal well pump rated 250.00 mĀ³/day ā 2.89352 L/s.
- Filter backwash line sized for 5.00 L/s ā 432.00 mĀ³/day.
- Groundwater remediation system rated 500.00 mĀ³/day ā 5.78704 L/s.
- Industrial process water loop at 12.00 L/s ā 1,036.80 mĀ³/day.
- Desal plant train rated 1,000.00 mĀ³/day ā 11.57407 L/s.
- City booster station leg at 60.00 L/s ā 5,184.00 mĀ³/day.
- Regional treatment works inlet 10,000.00 mĀ³/day ā 115.74074 L/s.
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