Pendulum Period Calculator
〰 Oscillations & waves. Use the Pendulum period formula to find period, length, g: pick the value you want, type the others, and the answer updates as you go.
For small swings (under about 15°). The mass doesn’t matter.
Period2.0061 s
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 |
|---|---|
| Period | s |
| Length | m |
| g | m/s² |
Worked example
Find the period when Length = 1 m, g = 9.81 m/s².
Using T = 2π√(L/g): Period = 2.0061 s.
Frequently asked questions
What is the formula for Pendulum period?
T = 2π√(L/g). For small swings (under about 15°). The mass doesn’t matter.
What do the letters stand for, and what units are used?
Period in s, Length in m, g in m/s².
How do you calculate period?
Put the values into T = 2π√(L/g). For example, with Length = 1 m, g = 9.81 m/s², period = 2.0061 s.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (period, length, g) and fill in the others: it rearranges the formula for you.
