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HVAC
AC Running Cost Calculator
Estimate your AC electricity cost per hour, day and month from AC size, running hours and your price per unit, with a downloadable PDF result.
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HVAC
AC Tonnage Calculator
Estimate the AC tonnage you need from room size, sun exposure, windows, people and equipment, with a downloadable PDF result.
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Electrical
Amps to kW calculator
Convert amps to kW or kW to amps for single phase, three phase and DC supplies, with kVA, kVAr, HP and a downloadable PDF result.
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Plumbing
Borewell Pump HP Calculator
Find the right borewell pump HP from water level, delivery height, flow and efficiency, with motor current and a downloadable PDF result.
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HVAC
BTU Calculator
Calculate BTU/h for AC cooling or room heating from room size, and convert BTU/h, kW, TR and kcal/h, with a downloadable PDF result.
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Electrical
Cable Size Calculator
Find the right copper or aluminium cable size from load, voltage drop and short-circuit limits, with a downloadable PDF result.
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Electrical
Capacitor Bank Calculator
Select an APFC capacitor bank by kW, power factor, voltage and detuned reactor, with step size, number of steps and a downloadable PDF result.
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Civil
Concrete Volume and Material Calculator (Cement, Sand, Aggregate)
Calculate the concrete volume of a slab, beam, footing, wall or column, and find the cement bags, sand, coarse aggregate and water needed for your mix.
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Plumbing
Daily Water Demand Calculator
Estimate the daily water demand of a building from occupancy, landscaping and losses, with domestic and flushing split and storage volume.
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Fire & Safety
Detector Count Calculator
Find how many smoke or heat detectors a room needs from its size and ceiling height, using typical NFPA 72 and IS 2189 spacing.
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General
EMI Calculator (Loan, Home, Car and Personal)
Calculate your monthly EMI, total interest and total payment for a home, car or personal loan, or find the loan amount you can afford from your EMI. Includes a yearly payment schedule.
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Fire & Safety
Fire Alarm Battery Calculator
Calculate the battery capacity (Ah) for a fire alarm system from standby and alarm currents, with a downloadable PDF result.
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Fire & Safety
Fire Pipe Pressure Loss Calculator
Calculate friction loss, velocity, required pipe size or maximum flow for fire sprinkler and hydrant pipes using the Hazen-Williams formula.
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Fire & Safety
Fire Pump Sizing Calculator
Size a fire pump from hazard class, pipe friction and height: get design flow, total head, standard pump rating and motor kW with a PDF result.
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Fire & Safety
Fire Water Tank Capacity Calculator (Sprinkler and Hydrant)
Calculate the fire water tank capacity for sprinkler and hydrant systems from hazard class, flow and duration, and check an existing tank. Also gives the suggested fire pump rating.
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Electrical
kW to kVA and kVA to kW Calculator
Convert kW to kVA or kVA to kW using power factor, and find the load current, reactive power and power factor angle for single phase and three phase systems.
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Plumbing
Pipe Sizing Calculator
Find the pipe diameter and standard size for a water flow and design velocity, or check the velocity and flow of an existing pipe.
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Plumbing
Pump Head (TDH) and Pump Power Calculator
Calculate the total dynamic head (TDH) of a pump from flow, pipe size, length and levels, and find the pump shaft power and the motor size.
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Fire & Safety
Sprinkler Flow and Heads Calculator
Calculate sprinkler design flow, operating heads, heads per room and K-factor pressure using typical NFPA 13 density and area values.
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Plumbing
STP Size Calculator
Find the sewage treatment plant (STP) size in KLD from building occupancy, with peak flow, reactor volume and equalization tank volume.
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Civil
Tile and Flooring Quantity Calculator
Find how many tiles and boxes you need for a floor, with wastage, and estimate the tile adhesive and grout. Also find the area covered by a number of tiles.
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HVAC
TR to CFM and CFM to TR Calculator
Convert TR to CFM or CFM to TR using the rule of thumb or the air temperature difference. Get airflow in m³/h and L/s, cooling capacity in kW and BTU/hr, and the electrical input power for chillers, split ACs and window ACs.
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Electrical
Voltage Drop Calculator
Calculate voltage drop in volts and percent for single phase, three phase and DC cables, with cable power loss and the minimum cable size for your limit.
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Plumbing
Water Tank Filling Time Calculator
Find how long a water tank takes to fill, or the flow needed to fill it in a set time, with outflow, partial levels and a PDF result.
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Plumbing
Water Tank Size Calculator (OHT and Underground)
Find the size of an overhead tank (OHT) or underground tank from daily water demand, or find the capacity of a rectangular or cylindrical tank from its dimensions.
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Plumbing
WTP Size Calculator
Find the water treatment plant (WTP) size from building occupancy, with raw water flow, filter diameter, raw water tank volume and chlorine need.
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