### Formula

Td

doubling time

t1

time at the start

t2

time at the end

q1

quantity of resource at t1

q2

quantity of resource at t2

Td

doubling time

t1

time at the start

t2

time at the end

q1

quantity of resource at t1

q2

quantity of resource at t2

When applied to the constant growth in consumption of a resource, the total amount consumed in one doubling period equals the total amount consumed in all previous periods. Given two measurements of a growing quantity, q1 at time t1 and q2 at time t2, and assuming a constant growth rate, This formula can be used to calculate the doubling time.

t1

t2

q1

q2

Td

Precision

- C
- C#
- C++
- Java
- JavaScript
- LaTeX
- PHP