Manufacturing Cost Calculator
Enter direct materials, direct labor, and manufacturing overhead to calculate total manufacturing cost, cost per unit, and cost of goods manufactured (COGM) with WIP adjustment — the three numbers every production accountant needs at period end.
Quick preset
Direct materials
Direct labor
Manufacturing overhead
Units & WIP (optional)
What to do next
Want to understand the formula in depth?
Step-by-step
What this calculator does
This manufacturing cost calculator computes total manufacturing cost (TMC) by summing direct materials used, direct labor (hours × wage rate), and manufacturing overhead. It also calculates cost per unit and — when WIP values are entered — adjusts for work-in-process to produce Cost of Goods Manufactured (COGM), the figure that flows into finished goods inventory and eventually into Cost of Goods Sold.
Formulas used
Total Manufacturing Cost (TMC) = Direct Materials + Direct Labor + Manufacturing Overhead
Cost per Unit = TMC ÷ Units Produced
COGM = TMC + Beginning WIP − Ending WIP
How to use
- Select a preset or enter your own data — start with the Furniture preset to see the format.
- DM Used: Enter raw materials consumed in production (not purchased — use Beginning RM + Purchases − Ending RM if needed).
- Direct Labor: Enter hours worked and average hourly wage for direct workers only. Supervisors and maintenance go into overhead.
- Overhead: Enter total indirect factory costs — rent, utilities, equipment depreciation, indirect labor, factory supplies.
- WIP (optional): Enter beginning and ending work-in-process inventory to get COGM. Leave at 0 if no WIP adjustment needed.
- Click Calculate — the waterfall and metric cards update instantly.
Example calculations
OH: $14,400 · No WIP
TMC: $60,000 · Cost/unit: $120
OH: $4,000 · No WIP
TMC: $18,000 · Cost/unit: $1.80
OH: $22,400 · No WIP
TMC: $100,000 · Cost/unit: $50
Beg WIP: $5,000 · End WIP: $7,500
COGM: $77,500 (−$2,500 net)
FAQ
What is the total manufacturing cost formula?
Total Manufacturing Cost = Direct Materials Used + Direct Labor + Manufacturing Overhead. Direct Labor = Hours × Wage Rate. Overhead includes all indirect factory costs: rent, utilities, equipment depreciation, indirect labor wages, and factory supplies.
What is the difference between TMC and COGM?
Total Manufacturing Cost (TMC) is all production costs incurred during the period. Cost of Goods Manufactured (COGM) adjusts for work-in-process: COGM = TMC + Beginning WIP − Ending WIP. When WIP does not change between periods, TMC equals COGM. COGM is the figure that flows into finished goods inventory.
Should I enter DM purchased or DM used?
Always enter Direct Materials Used — the materials that actually flowed into production. If you have DM purchased but not used, calculate DM Used first: Beginning Raw Materials + Purchases − Ending Raw Materials = DM Used.
Which workers count as direct labor?
Only workers who directly transform raw materials into finished goods — assembly workers, machine operators, welders, fabricators. Supervisors, quality control inspectors, maintenance staff, and factory managers are indirect labor and belong in overhead, not direct labor.
What goes into manufacturing overhead?
Factory rent and lease payments, factory utilities (electricity, water, gas), depreciation on manufacturing equipment, indirect labor wages (supervisors, maintenance, QC), factory insurance, factory supplies, and small tools. Corporate office costs are period costs — they do not belong in overhead.
How is cost per unit used in practice?
Cost per unit is used for inventory valuation (carrying value of finished goods on the balance sheet), product pricing decisions, gross margin analysis, and job costing. Under GAAP, finished goods inventory must be valued at manufacturing cost per unit — not selling price.
Related tools
Disclaimer: This calculator provides planning estimates for educational purposes. Actual manufacturing costs depend on specific accounting policies, overhead allocation methods, standard vs actual costing systems, and whether costs are correctly classified as product vs period. Consult a licensed accountant for formal cost accounting and financial reporting.