GPM per Ton Calculator
Chilled/condenser water flow per ton at any design ΔT — and the classic 2.4/3.0 anchors.
Bigger ΔT = smaller pumps & pipes: moving from 10 °F to 14 °F design cuts pump flow 29%. Condenser side runs ~3 gpm/ton (heat of rejection ≈ 1.25× load).
Formula
GPM per Ton Calculator is a free gpm per ton for HVAC designers, technicians and energy auditors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About GPM per Ton Calculator
Chilled/condenser water flow per ton at any design ΔT — and the classic 2.4/3.0 anchors. The calculation implements L/s per ton = 3.517/(4.186·ΔT); US: gpm/ton = 24/ΔT(°F) (ASHRAE chilled-water plant design guide). Bigger ΔT = smaller pumps & pipes: moving from 10 °F to 14 °F design cuts pump flow 29%. Condenser side runs ~3 gpm/ton (heat of rejection ≈ 1.25× load).
How to use GPM per Ton Calculator
- 1Enter Design water ΔT in °C (5.6 °C (10 °F) CHW classic; 6.7–8.9 for low-flow).
- 2Enter Plant capacity in TR.
- 3Read Flow per ton, Total flow instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use GPM per Ton Calculator?
- ✓Implements the standard formula — L/s per ton = 3.517/(4.186·ΔT); US: gpm/ton = 24/ΔT(°F)
- ✓Reference cited on-page: ASHRAE chilled-water plant design guide
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the GPM per Ton Calculator use?+
It computes L/s per ton = 3.517/(4.186·ΔT); US: gpm/ton = 24/ΔT(°F), per ASHRAE chilled-water plant design guide. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Bigger ΔT = smaller pumps & pipes: moving from 10 °F to 14 °F design cuts pump flow 29%. Condenser side runs ~3 gpm/ton (heat of rejection ≈ 1.25× load).
Is this based on ASHRAE methods?+
The calculations follow the standard ASHRAE/ISHRAE formulations cited under the result, simplified where industry practice does the same. For permit-grade design, confirm with the full code procedure.
Is the GPM per Ton Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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