It really depends on the kind of energy. Different kinds of energy are calculated in different ways.
This can usually be done algebraically.
by counting and calculating
You can use math in running by calculating how many miles or yards you have run.
Mental math! aka in ur head
by calculating their plays.
In the SI system the units are Joules. You can also use ftlbf (footpoundforce). For thermal energy use calories or BTU
Calculating volume and surface area.
By calculating the distance of how far you rode
Joules
In physics, the total amount of energy is measured in joules. The rate of energy use - joules/second - is the power, the unit is also known as watt. Electricity companies tend to use another measure for energy use: the kilowatt-hour (kWh), which of course is equal to 3.6 million joules.
Teachers use math when calculating grade and point values of assignments, when math relates to other subjects, when teaching math, and making a schedule.
One way they use math is by calculating a person's blood pressure. Math is used daily by just about everyone.