Borewell Pump Sizing Calculator
Pump kW/HP, daily energy and monthly cost from flow, head and efficiency — borewell submersible.
Deep bores are mostly head: 80 m of lift at 2.5 L/s needs ~3.9 kW shaft power before pipe friction. Match the pump curve to YOUR static level plus drawdown — the burned-out replacements are sized by guesswork.
Borewell submersible: hydraulic power = ρgQH; the efficiency divisor turns it into the electrical truth. The litres-per-rupee line is the metric that matters — an efficient smaller pump often moves more water per rupee than the oversized "powerful" one.
Engineering estimate from published standards and typical equipment data. Site conditions, equipment datasheets and measured data govern the real result — confirm with a qualified engineer.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Use the free Borewell Pump Sizing Calculator online — Pump kW/HP, daily energy and monthly cost from flow, head and efficiency — borewell submersible. Runs instantly in your browser: no signup, no upload, mobile-friendly.
About Borewell Pump Sizing Calculator
Deep bores are mostly head: 80 m of lift at 2.5 L/s needs ~3.9 kW shaft power before pipe friction. Match the pump curve to YOUR static level plus drawdown — the burned-out replacements are sized by guesswork.
How to use Borewell Pump Sizing Calculator
- 1Enter flow, total head and an honest efficiency.
- 2Set daily hours and tariff.
- 3Read required kW/HP and the monthly energy cost.
Why use Borewell Pump Sizing Calculator?
- ✓Hydraulic-power physics with wire-to-water honesty
- ✓kW and HP outputs sized to real duty, not dealer instinct
- ✓Litres-per-rupee — the metric that exposes oversized pumps
- ✓Monthly cost at your tariff and hours
Frequently asked questions
How do I calculate what pump size I need?+
Hydraulic kW = 9.81 × flow(m³/s) × head(m); shaft kW = that ÷ wire-to-water efficiency (0.45–0.7 typical). 5 L/s up 30 m needs ~1.5 kW hydraulic, ~2.7 kW (3.5 HP) real. Oversizing 'to be safe' buys throttling losses and short-cycling — size to the duty point.
What efficiency should I assume for a pump?+
Wire-to-water (pump × motor): quality matched systems 0.55–0.70; old, oversized or throttled installations 0.30–0.45 — field audits of Indian agricultural pumps average a dismal ~0.35. If your measured numbers imply less than 0.45, the replacement usually pays back within a year.
Why does my pump bill so much for so little water?+
Check the trio: friction head from undersized pipes (see the head-loss tools — often the silent half of total head), a worn impeller (efficiency decays invisibly), and oversizing (running far off the curve). The litres-per-rupee output here benchmarks your system against an honest one.
What does total head include?+
Static lift (vertical distance) + friction losses (pipes, fittings, filters) + any pressure requirement at the outlet (drip systems need 1.5–2.5 bar ≈ 15–25 m). Forgetting friction and outlet pressure is why 'calculated' pumps disappoint — measure or compute all three parts.
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