Logarithm Calculator
𝑥 Algebra. Use the Logarithm formula to find log, base b, x: pick the value you want, type the others, and the answer updates as you go.
log3
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 |
|---|---|
| log | no unit |
| Base b | no unit |
| x | no unit |
Worked example
Find the log when Base b = 10, x = 1000.
Using y = x ⇔ b^y = x: log = 3.
Frequently asked questions
What is the formula for Logarithm?
y = x ⇔ b^y = x.
What do the letters stand for, and what units are used?
log, Base b, x.
How do you calculate log?
Put the values into y = x ⇔ b^y = x. For example, with Base b = 10, x = 1000, log = 3.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (log, base b, x) and fill in the others: it rearranges the formula for you.
