# Convertitore di portata

> Converti L/min in gpm, gpm in L/min, cfm in m³/h e m³/h in L/s per pompe, impianti idraulici e ventilazione, con i valori esatti del gallone USA e del piede cubo.

Versione interattiva: https://www.calcopenly.com/it/conversion/flow-rate-converter
Argomento: Convertitori di unità

Flow rate is volume per time, and each unit here is a fixed number of cubic metres per second. The US gallon (3.785411784 L) and the cubic foot (28.316846592 L) are exact, so litres per minute, gallons per minute and cubic feet per minute convert with no rounding in the factors.

The default converts 10 L/min to 2.64 US gpm, close to the 2.5 gpm (9.46 L/min) of a standard US showerhead. Plumbers and pump buyers use L/min and gpm, fan and compressor ratings use cfm or m³/h, and river flows are reported in m³/s (cumecs).

The gallon here is the US gallon. An imperial gallon per minute is 4.54609 L/min, 20% more, so check which gallon a specification uses before converting it.

## Dati

- **Valore**: Un numero nell’unità di partenza, oppure accompagnato dalla propria unità
- **Da** (opzioni: cubic metre per second (m³/s), cubic metre per hour (m³/h), litre per second (L/s), litre per minute (L/min), litre per hour (L/h), US gallon per minute (gal/min), cubic foot per minute (ft³/min))
- **A** (opzioni: cubic metre per second (m³/s), cubic metre per hour (m³/h), litre per second (L/s), litre per minute (L/min), litre per hour (L/h), US gallon per minute (gal/min), cubic foot per minute (ft³/min))

## Risultati

- Valore convertito — risultato principale
- Conversione
- Fattore di conversione
- Esattezza

## Formula

$$
\begin{gathered} x_{\text{to}} = x_{\text{from}} \times \dfrac{f_{\text{from}}}{f_{\text{to}}} \\ f = \text{one unit expressed in } \text{m³/s} \end{gathered}
$$

## Esempi svolti

### 10 L/min in US gal/min

- Valore: 10 L/min
- Da: litre per minute (L/min)
- A: US gallon per minute (gal/min)
- **Valore convertito: 2.6417205236 gal/min**
- Fonte di verifica: 10 L ÷ 3.785411784 L = 1250000000/473176473 (Python 3.8 fractions from the legal definitions)

### 1 m³/s in L/s

- Valore: 1 m³/s
- Da: cubic metre per second (m³/s)
- A: litre per second (L/s)
- **Valore convertito: 1,000 L/s**
- Fonte di verifica: 1 m³ = 1000 L

### 1 cfm in L/min

- Valore: 1 ft³/min
- Da: cubic foot per minute (ft³/min)
- A: litre per minute (L/min)
- **Valore convertito: 28.316846592 L/min**
- Fonte di verifica: 1 ft³ = 0.3048³ m³ = 28.316846592 L (NIST HB 44 App. C)

### 1 m³/h in L/s

- Valore: 1 m³/h
- Da: cubic metre per hour (m³/h)
- A: litre per second (L/s)
- **Valore convertito: 0.2777777778 L/s**
- **Esattezza: Definizioni esatte, decimale periodico**
- Fonte di verifica: 1000 L / 3600 s = 5/18

## Domande

### How do I convert L/min to gpm?

Divide by 3.785411784, or multiply by 0.264172. 10 L/min is 2.64 US gpm and 20 L/min is 5.28 gpm. To go from US gpm to L/min, multiply by 3.785, so a 2.5 gpm showerhead runs at 9.46 L/min.

### How do I convert cfm to m³/h?

Multiply by 1.69901. A cubic foot is 0.028316846592 m³ and an hour is 60 minutes, so 1 cfm = 1.69901079552 m³/h exactly. A 100 cfm bathroom fan moves 169.9 m³/h, or 47.2 L/s. To go from m³/h to cfm, multiply by 0.588578.

### What is a normal shower flow rate?

The US EPA puts standard showerheads at 2.5 gallons per minute, 9.46 L/min, and requires WaterSense-labelled ones to use no more than 2.0 gpm, 7.57 L/min. A 10-minute shower at 2.5 gpm uses 25 gallons, or 94.6 litres. Timing how long your shower takes to fill a 1-litre jug gives your own figure: 6 seconds means 10 L/min.

### How do I convert m³/h to L/s?

Divide by 3.6. A cubic metre is 1,000 litres and an hour 3,600 seconds, so 1 m³/h = 1,000/3,600 = 0.2778 L/s, a repeating decimal. A pump rated at 36 m³/h delivers exactly 10 L/s, or 600 L/min.

### Is gpm in US or imperial gallons?

In this converter, US gallons: 1 gpm = 3.785411784 L/min. Imperial gallons per minute are 4.54609 L/min, 20% larger, and appear on equipment specified in imperial units. To convert an imperial figure, multiply it by 1.20095 to get US gpm before entering it.

### Quanto è preciso «Convertitore di portata»?

La precisione dipende dai dati inseriti e dalle ipotesi del metodo. Il calcolo decimale usa 50 cifre significative, ma stime, metodi numerici e dati di origine possono essere meno precisi; l’arrotondamento visualizzato non elimina questi limiti. Esempi svolti verificati con fonti indipendenti: 4. Per esempio, «10 L/min in US gal/min» viene verificato con 10 L ÷ 3.785411784 L = 1250000000/473176473 (Python 3.8 fractions from the legal definitions).

### Da dove proviene il metodo?

NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors; NIST Handbook 44, Appendix C — General tables of units of measurement.

## Fonti

- [NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C — General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)