Cost of Electricity Calculator
🛹 Work, energy & power. Use the Cost of electricity formula to find cost, power, time, price per kwh: pick the value you want, type the others, and the answer updates as you go.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Cost | p |
| Power | kW |
| Time | h |
| Price per kWh | p |
Worked example
Find the cost when Power = 2 kW, Time = 1.5 h, Price per kWh = 28 p.
Using cost = P(kW) × t(h) × price per kWh: Cost = 84 p.
Frequently asked questions
What is the formula for Cost of electricity?
cost = P(kW) × t(h) × price per kWh.
What do the letters stand for, and what units are used?
Cost in p, Power in kW, Time in h, Price per kWh in p.
How do you calculate cost?
Put the values into cost = P(kW) × t(h) × price per kWh. For example, with Power = 2 kW, Time = 1.5 h, Price per kWh = 28 p, cost = 84 p.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (cost, power, time, price per kwh) and fill in the others: it rearranges the formula for you.
