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Full sprinkler coverage: head spacing, head count, branch/main pipe sizes. NFPA 13/IS 15105.Calculate
More Calculators
Detailed genset sizing with temperature, altitude and harmonic derating. IS 10000/ISO 8528.Calculate
Size underground SWA/XLPE cables with ground temperature and grouping derating. IS 7098/BS 5467.Calculate
Number of sprinklers, spacing, water demand and min pressure by area and hazard. NFPA 13/IS 15105.Calculate
Pressure drop in ductwork including bends and fittings. Altschul-Tsal equation. ASHRAE/SMACNA.Calculate
Size gas distribution pipes from appliance kW loads. Converts heat demand to flow. IS 6044/IGC.Calculate
Compressed air ring main sizing with multiple outlets, pressure drop and receiver sizing. ISO 8573.Calculate
Multi-load transformer sizing with diversity/demand factors. IS 2026 standard kVA selection.Calculate
Generator sizing with separate critical and non-critical load lists. Fuel tank for 8hr/24hr runs. IS 10000.Calculate
Building water supply: WSFU, peak flow, riser/branch pipe sizes and tank capacity. IS 2065.Calculate
Full SWA cable sizing for LV (415V), HT (11kV, 33kV) feeders with short circuit rating check.Calculate
Agent quantity, cylinder count and vent sizing for clean-agent suppression rooms. NFPA 2001/ISO 14520.Calculate
Complete hydrant system: flow, pressure, pipe sizing, pump duty, jockey pump and storage tank. NBC/IS 3844.Calculate
CHW flow rate, pipe size, pressure drop, insulation thickness and pump head. ASHRAE/CIBSE Guide C.Calculate
Capacity, water flows, evaporation loss, blowdown and makeup water requirement. CTI/ASHRAE.Calculate
Sump and overhead tank sizing, dimensions, pump capacity and refill time. NBC India/IS 1172.Calculate
Stack and branch sizing from drainage fixture units using Manning's equation. IS 5329/NBC India.Calculate
Comprehensive cable sizing per IS 732/IS 1554/IS 7098 with full derating, designation and SC check.Calculate
Earth electrode resistance, combined resistance and conductor sizing per IS 3043 / IEEE 80.Calculate
3ϕ, 1ϕ, L-L fault currents, fault MVA, switchgear rating and busbar requirements. IS 13234/IEC 60909.Calculate
Bill of Quantities for electrical systems with INR rates. CPWD DSR 2023 / India market 2024-25.Calculate
Combined MEP project cost estimate with CPWD DSR benchmarks and city factor. Printable report.Calculate
Calculate capacitor bank size (kVAr) to correct power factor to target. IS 732 / IEEE 1459.Calculate
Size a UPS / online inverter from connected load, PF and backup time. IS 16242 / IEC 62040.Calculate
DOL / Star-Delta / VFD starter and cable selection for 3-phase motors. IS 8544 / IEC 60947.Calculate
Estimate EV charging electrical load, cable and circuit breaker sizing. IS 17017 / IEC 61851.Calculate
Size Air Handling Unit - airflow, coil, fan kW and duct connection. ASHRAE 62.1 / NBC Part 8.Calculate
Minimum insulation thickness for pipes and ducts to prevent condensation and heat gain. IS 14164 / ASHRAE 90.1.Calculate
Calculate wet bulb, dew point, humidity ratio, enthalpy from DB and RH. ASHRAE Fundamentals.Calculate
Size liquid and suction refrigerant pipes for VRF and split AC systems. ASHRAE / Manufacturer guidelines.Calculate
Size kitchen grease trap / interceptor from meal count or fixture units. IS 5329 / NBC Part 9.Calculate
Size roof drain outlets, gutters and downpipes from rainfall intensity. IS 1742 / NBC Part 9.Calculate
Total fire water storage requirement for combined hydrant + sprinkler demand. NBC Part 4 / IS 15105.Calculate
Calculate Net Positive Suction Head available (NPSHa) to prevent pump cavitation. IS 9137 / HI.Calculate
Ventilation air for gas meter rooms and boiler rooms to prevent accumulation. IS 6044 / NBC.Calculate
P-trap seal and total depth for AHU drain pans from fan static pressure. Draw-through / blow-through.Calculate
Size dust extraction ducts to minimum transport velocity so material stays airborne. ACGIH.Calculate
Size a supply diffuser or return grille neck from airflow and target face velocity, with a noise check.Calculate
Estimate traction lift motor power and full-load current from rated load, speed and counterweight balance.Calculate
Circulation flow and filter area for a swimming pool from volume and required turnover time.Calculate
Free MEP Engineering Calculators – HVAC, Electrical, Plumbing, Fire & Gas
114+ free online MEP calculators for HVAC, electrical, plumbing, fire-protection and gas engineers — including cable & wire sizing, voltage drop, duct & pipe sizing, cooling & heat load, pump head, chiller tonnage, and fire-pump & sprinkler design. Every tool follows US codes and standards (NEC, ASHRAE, SMACNA, IPC, NFPA, IEEE) with imperial-first inputs, instant results, PDF export — free to get started.
Formula Library
80 MEP engineering formulas - searchable, with derivations, examples and IS code references
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