Run common engineering calculations for electricity cost, Ohm's law, heat index, wind chill, speed, data transfer rates, and scientific conversions.
Calculators in this category
- Scientific Calculator — Full-featured scientific calculator with trig, hyperbolic, logarithms, powers, and engineering notation.
- Ohm's Law Calculator — Solve voltage, current, resistance, or power from the other values.
- Electricity Cost Calculator — Estimate electricity cost from wattage and usage.
- BTU Calculator — Estimate the BTU capacity needed for a room.
- Speed Calculator — Solve for speed, distance, or travel time.
- Bandwidth Calculator — Convert data rates and estimate transfer times.
- Wind Chill Calculator — Estimate how cold it feels from temperature and wind.
- Heat Index Calculator — Estimate how hot it feels from temperature and humidity.
- Resistor Color Code Calculator — Decode 4-band or 5-band resistor colour rings into resistance value, tolerance and min/max range.
- Voltage Divider Calculator — Compute output voltage, current and power dissipation for any two-resistor voltage divider circuit.
- Dew Point Calculator — Find the dew point from air temperature and relative humidity, plus a plain-language comfort rating.
- Voltage Drop Calculator — Estimate voltage drop across a cable run from current, length, and wire resistance — single or three phase.
- Molecular Weight Calculator — Parse a chemical formula like H2O or NaCl and calculate molecular weight in g/mol from atomic masses.
- PPI (Pixels Per Inch) Calculator — Calculate screen PPI from horizontal pixels, vertical pixels, and diagonal size in inches.
- Tank Volume Calculator — Calculate storage tank volume for cylindrical, rectangular, and capsule shapes in litres and gallons.