HesapHanem

Fixed vs Variable Cost Calculator

See total cost broken into fixed and variable.

How it is calculated

Total cost is the fixed part plus the variable part at the output level you choose: variable total = variable cost per unit × units and total cost = fixed cost + variable total. Fixed cost is what you pay for the period however much you make, in dollars (rent, salaries, insurance), variable cost per unit is the dollar cost that each extra unit adds (materials, packaging, shipping), and units is the output or sales volume for the same period. The fixed amount must cover the same period as the units, so monthly rent goes with monthly volume. The tool shows total cost, the variable total and the fixed amount side by side, but does not compute cost per unit or percentages, which you can find by dividing total cost by units. Zero units gives just the fixed cost; negative or empty values return no result.

Worked example

A workshop pays $12,000 a month in fixed costs, and each unit costs $8.50 in materials and packing. At 2,000 units: variable total = 8.50 × 2,000 = $17,000.00. Total cost = 12,000 + 17,000 = $29,000.00. Dividing by volume gives an average of $14.50 per unit, of which $6.00 is fixed cost spread over the 2,000 units and $8.50 is variable. At 4,000 units the total would be $46,000.00, or $11.50 per unit, because the fixed cost is spread wider.

Try this example →

Common mistakes

  • Treating a semi-variable cost, such as a phone plan with a base fee plus usage, as entirely fixed or entirely variable. Split it into its fixed and per-unit parts before entering it.
  • Mixing periods, for example annual fixed costs with monthly units. Both must cover the same period.
  • Using the average cost per unit as the variable cost. That figure already contains fixed costs spread over volume, so it overstates the cost of one more unit.
  • Assuming fixed costs stay fixed at any volume. Beyond a certain output you may need more space or staff, so the tool is reliable only within the range where your fixed cost really is fixed.

About this calculator

Every business cost falls into one of two buckets: fixed costs, which stay the same regardless of how much you produce or sell (rent, salaried wages, insurance), and variable costs, which rise and fall directly with output (raw materials, per-unit shipping, sales commissions). Splitting costs this way is the foundation of cost-volume-profit analysis and break-even calculations.

This calculator takes your fixed cost, your variable cost per unit, and a chosen output level, and returns the variable cost total, the combined total cost, and the split between them at that volume. Business owners and finance teams use this breakdown to see how much of their cost structure is locked in versus how much scales with activity — a key input for pricing decisions, break-even analysis, and understanding operating leverage.

Was this helpful?

You can pick up to 3 reactions.

Comments

  • Be the first to comment.

Popular calculators

Loan Calculator

Monthly payment, total interest and full amortization schedule.

Percentage Calculator

Percent change, percent of, and ratio calculations.

Discount Calculator

Calculate final price, savings, and discount amount.

BMI Calculator

Body mass index from height and weight (metric or imperial).

Age Calculator

Compute your exact age in years, months and days from a birth date.

Compound Interest Calculator

Calculate the final amount and interest earned with compounding.

All Calculators