Tank Fill Time Calculator
How long a pump or supply line takes to fill a tank of known capacity.
A typical 1 HP domestic pump delivers ~1.5 L/s against low head — a 5,000 L overhead tank fills in just under an hour.
Formula
Tank Fill Time Calculator is a free tank fill time for process, mechanical and water engineers — 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 Tank Fill Time Calculator
How long a pump or supply line takes to fill a tank of known capacity. The calculation implements t = (V_tank − V_now) / Q (Basic rate equation). A typical 1 HP domestic pump delivers ~1.5 L/s against low head — a 5,000 L overhead tank fills in just under an hour.
How to use Tank Fill Time Calculator
- 1Enter Tank capacity in L.
- 2Enter Already in tank in L.
- 3Enter Fill rate in L/s.
- 4Read Fill time, Fill time instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Tank Fill Time Calculator?
- ✓Implements the standard formula — t = (V_tank − V_now) / Q
- ✓Reference cited on-page: Basic rate equation
- ✓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 Tank Fill Time Calculator use?+
It computes t = (V_tank − V_now) / Q, per Basic rate equation. 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?+
A typical 1 HP domestic pump delivers ~1.5 L/s against low head — a 5,000 L overhead tank fills in just under an hour.
Does this work for any fluid?+
Yes — density and viscosity are inputs (with common fluids suggested in the field hints), so the same physics applies to water, oils, gases and process fluids. Compute always runs in SI internally, so unit mix-ups can't corrupt the result.
Is the Tank Fill Time 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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