High-Low Method Calculator
Results are estimates based on the values you enter. Recheck your inputs and assumptions before using the output for decisions.
Estimate variable cost per unit and fixed cost from the highest and lowest activity periods.
High-Low Method Calculator
Free online High-Low Method calculator to estimate variable cost per unit and fixed cost from the highest and lowest activity periods. This calculator is useful for cost accountants, business owners, operations managers, finance students, analysts, and anyone who wants a simple way to split mixed costs into variable and fixed components. The high-low method is widely used in managerial accounting because it gives a quick estimate from only two activity levels and their total costs.
This page uses four inputs: high activity units, high activity total cost, low activity units, and low activity total cost. It compares the change in total cost with the change in activity to estimate the variable cost per unit. Then it uses that variable cost estimate together with one of the activity points to estimate fixed cost. The calculator also shows the cost difference between the two periods. That makes the result useful for budgeting, cost behavior analysis, and contribution planning when you need a fast estimate without building a full regression model.
The formula of High-Low Method
Variable cost per unit = (High total cost – Low total cost) / (High activity units – Low activity units)
Fixed cost = High total cost – (Variable cost per unit x High activity units)
Cost difference = High total cost – Low total cost
Here high activity units means the production level, machine hours, labor hours, or service volume in the highest activity period. Low activity units means the comparable activity level in the lowest activity period. High total cost and low total cost are the total mixed costs at those two activity levels. The method assumes cost behavior between those two points is approximately linear.
Solved Example
Example 1: Find the variable cost per unit and fixed cost if high activity is 1,000 units with total cost of $18,500, and low activity is 600 units with total cost of $12,500.
Solve: Cost difference = 18500 – 12500 = $6,000
Activity difference = 1000 – 600 = 400 units
Variable cost per unit = 6000 / 400 = $15.00
Fixed cost = 18500 – (15 x 1000) = 18500 – 15000 = $3,500
Example 2: Find the result if high activity is 2,400 hours with total cost of $41,000, and low activity is 1,600 hours with total cost of $29,000.
Solve: Cost difference = 41000 – 29000 = $12,000
Activity difference = 2400 – 1600 = 800 hours
Variable cost per unit = 12000 / 800 = $15.00
Fixed cost = 41000 – (15 x 2400) = 41000 – 36000 = $5,000
Example 3: Find the result if high activity is 900 jobs with total cost of $22,800, and low activity is 500 jobs with total cost of $14,800.
Solve: Cost difference = 22800 – 14800 = $8,000
Activity difference = 900 – 500 = 400 jobs
Variable cost per unit = 8000 / 400 = $20.00
Fixed cost = 22800 – (20 x 900) = 22800 – 18000 = $4,800
Table of High-Low Method calculator
| High Activity | High Cost | Low Activity | Low Cost | Variable Cost / Unit | Fixed Cost |
|---|---|---|---|---|---|
| 900 | $22,800 | 500 | $14,800 | $20.00 | $4,800 |
| 1,000 | $18,500 | 600 | $12,500 | $15.00 | $3,500 |
| 2,400 | $41,000 | 1,600 | $29,000 | $15.00 | $5,000 |
| 3,500 | $63,000 | 2,000 | $40,500 | $15.00 | $10,500 |
How to use this High-Low Method calculator
Enter the highest activity level in the proper input field and then enter the total cost at that high activity point. After that, enter the lowest activity level and its total cost. Make sure both activity points describe the same cost pool and use the same unit of measurement, such as units produced, labor hours, machine hours, or service jobs. Then click the calculate button. The calculator will show the estimated variable cost per unit, estimated fixed cost, and cost difference in the result box.
This calculator is useful when building flexible budgets, estimating cost behavior, checking mixed overhead trends, and preparing basic managerial accounting analysis. A stable variable cost estimate can help with pricing, forecasting, and break-even analysis. The fixed cost estimate helps show the portion of mixed cost that does not change with short-run activity. Looking at both together makes it easier to understand how cost responds as volume rises or falls.
When using the result, remember that the high-low method is a quick estimate, not a precision model. It uses only the highest and lowest activity points, so unusual months or outlier periods can distort the result. Even so, it remains a practical first-pass tool when you need a simple cost split without deeper statistical work. This calculator gives a fast numerical view that supports budgeting, cost control, classroom learning, and business planning.