FRENESDEIT
Free calculators

Technical

The Technical category groups tools for HVAC, ventilation, IT, networks and datacentres. You can convert BTU/h and kW, connect airflow, room volume and air changes, determine duct speed or diameter, estimate heat actually released by IT equipment, calculate transfer time and compare theoretical usable RAID capacity. Simply choose the subcategory that interests you, then open the tool you need.

Air conditioning & ventilation

Convert thermal power and connect airflow, air changes, speed and duct diameter.

BTU/h ↔ kW conversion

Convert BTU/h to kW or watts and back to compare air-conditioner capacity. Use the free converter and check the formula and examples.

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Airflow and ACH

Calculate airflow or air changes per hour from the room volume.

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Duct air velocity and diameter

Relate airflow, air speed and the internal diameter of a circular duct.

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IT & datacentre

Estimate IT heat and theoretical RAID capacity from actual equipment data.

IT equipment heat output

Turn the measured electrical input of IT equipment into a room heat load.

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Theoretical usable RAID capacity

Compare raw and theoretically usable capacity for the main RAID levels.

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Network & transfer

Calculate transfer time while distinguishing bits, bytes, decimal and binary units.

Network transfer time

Estimate transfer time while distinguishing bits, bytes, decimal and binary units.

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