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Free fleet and industrial calculators

121 calculators across fleet, tyres, fuel, fluid engineering, warehouse, finance and operations KPIs. The top 10 are fully interactive; the rest show the formula so you can work the number out yourself.

free calculators
121
fully interactive
10
subject areas
10

The top 10, fully interactive

Enter your numbers and get the result, with warnings and recommendations.

Engineering estimate

Axle Load Distribution Calculator

Front and rear axle loads from total mass + CG

rear_axle_load = total_mass × cg_from_front_axle ÷ wheelbase, when wheelbase > 0 && cg_from_front_axle <= wheelbase; front_axle_load = total_mass − total_mass × cg_from_front_axle ÷ wheelbase, when wheelbase > 0 && cg_from_front_axle <= wheelbaseOpen calculator
Advanced

Tyre Remaining Life Calculator

Predict remaining km from tread wear rate

wear_rate = (previous_tread − current_tread) ÷ distance_run × 1000, when previous_tread > current_tread && distance_run > 0; remaining_km = current_tread <= minimum_tread ? 0 : ((current_tread − minimum_tread) ÷ wear_rate × 1000, when previous_tread > current_tread && distance_run > 0)Open calculator
Simple

Tyre Cost per KM Calculator

Real cost per kilometre for a tyre

cost_per_km = tyre_cost ÷ distance_achievedOpen calculator
Advanced

Dual Tyre Mismatch Calculator

Check rolling-circumference mismatch on dual axles

mismatch_percent = abs(circumference_a − circumference_b) ÷ max(circumference_a, circumference_b) × 100Open calculator
Simple

Fuel Cost per Trip Calculator

Fuel cost for a single trip — litres × price

fuel_cost = fuel_used × fuel_priceOpen calculator
Engineering estimate

Horizontal Tank Partial Fill Calculator

Volume in a part-full horizontal cylindrical tank

partial_volume = length × (radius² × acos((radius − fill_height)/radius) − (radius − fill_height) × sqrt(2×radius×fill_height − fill_height²))Open calculator
Advanced

Pipe Pressure Drop Calculator

Darcy-Weisbach friction pressure drop in a pipe

pressure_drop = friction_factor × (pipe_length÷diameter) × (density × velocity² ÷ 2)Open calculator
Advanced

Reorder Point Calculator

Stock level that triggers a new purchase order

reorder_point = average_daily_demand × lead_time_days + safety_stockOpen calculator
Advanced

Break-even Units Calculator

Units to sell before fixed costs are covered

break_even_units = fixed_cost / (selling_price - variable_cost), when selling_price > variable_costOpen calculator
Simple

ROI Calculator

Return on investment — gain ÷ cost × 100

roi_percent = (gain − cost) ÷ cost × 100Open calculator

The full catalogue: 111 formulas

Construction1

Finance and pricing34

Fleet fuel18

Fleet and vehicle5

Fluid engineering1

People and manpower10

Maintenance10

Operations KPIs29

Structural engineering1

Warehouse and inventory2