Fleet & Plant Calculators
Free tools built for UK construction, plant hire, logistics, agriculture and manufacturing. Calculate diesel usage, finance costs, hourly running costs and more — no login required.
Machinery Diesel Usage Calculator
Calculate litres per acre, hectare, hour or mile + fuel cost for tractors, excavators, telehandlers and plant equipment.
Vehicle Diesel Usage Calculator
See mpg, litres per 100km and cost per mile for HGVs, lorries, vans and commercial vehicles (white diesel).
Plant & Machinery Finance Calculator
Work out monthly payments, total interest and finance cost per hour for excavators, telehandlers, forklifts, tractors & more.
Plant & Machinery Operating Costs Calculator
Get the true hourly or per-mile running cost — depreciation, fuel, maintenance, labour, tyres/tracks, finance & tax.
Tractor Operating Costs Calculator
Calculate full hourly running cost for tractors — depreciation, fuel, labour, tyres, maintenance, finance, tax & insurance.
BSP Spanner Size Chart
Free BSP spanner size reference — outer diameter, TPI and spanner size in mm for every British Standard Pipe fitting, 1/8" to 3".
Metric Bolt Size Chart
Free metric bolt reference M3 to M48 — spanner and hex key sizes, bolt grade guide (8.8, 10.9, 12.9) and torque settings.
Imperial to Metric Spanner Chart
Convert imperial AF spanner sizes to metric mm, find the closest socket, plus a thread standard guide by machinery era.
Bolt Torque Settings Calculator
Metric bolt torque chart M5 to M30 — grades 8.8, 10.9 and 12.9, adjusts for lubrication condition and thread type.
BSP Tap Drill Size Calculator
Correct tapping drill size for every BSP pipe thread, 1/8" to 2" — includes OD, TPI and a step-by-step tapping guide.
Tapping Drill Size Chart
Complete tapping drill reference — Metric Coarse, Metric Fine, BSP, Whitworth (BSW) and UNF threads, with clearance drill sizes.
Hydraulic Hose & Fitting Size Guide
BSP, JIC 37° flare, ORFS and hose dash size reference, plus a visual fitting identification guide. Free PDF.
kW to HP Converter
Instant kW to HP conversion with a tractor engine power reference table, PTO vs engine HP guide, and implement power requirements.
Track Everything Automatically
These free calculators are just the start. FleetBolt automatically tracks fuel fills, mpg/hourly costs, finance payments, maintenance schedules, LOLER/MOT reminders and full fleet compliance — all in one secure place.
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