Free Manufacturing Calculators
Quick, no-signup tools for the numbers small manufacturers calculate every week. See the formula, plug in your own figures, get an answer.
Reorder Point Calculator
Figure out exactly when to reorder a material or product based on usage rate, lead time, and safety stock.
COGS Calculator
Calculate cost of goods sold for a period from beginning inventory, purchases, and ending inventory — plus gross margin.
Safety Stock Calculator
Size the buffer inventory a raw material needs from max/average usage and supplier lead time — plus the resulting reorder point.
EOQ Calculator
Find the order quantity that minimizes ordering and holding cost for a raw material, from annual demand and cost inputs.
COGM Calculator
Calculate cost of goods manufactured from beginning WIP, direct materials, direct labor, overhead, and ending WIP.
Overhead Rate Calculator
Allocate manufacturing overhead by direct labor or machine hours and find overhead applied per unit for product costing.
Inventory Turnover Calculator
Calculate turnover and days inventory separately for raw materials, WIP, and finished goods — not one blended number.
Capacity Utilization Calculator
Find production capacity utilization from available vs. used labor or machine hours, with bottleneck-risk interpretation.
Spreadsheet Cost Calculator
Find the true annual cost of running inventory on spreadsheets — labor hours plus stockout losses — projected over 3 years.
Want these numbers calculated automatically from your real inventory and production data instead of typed in by hand? Start a free Nstock trial.