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.
Owned vs Contractor Calculator
Should you buy machinery or hire a contractor? Compare true ownership costs — depreciation, fuel, labour, maintenance — against hire rates for an instant verdict.
Machinery Cost to Change Calculator
Compare the full annual cost of keeping your current machine against trading up to new — depreciation, finance, service costs and cost per hour.
Ratchet Strap Calculator
How many ratchet straps do you need? EN 12195 method with strap angle correction, for fleet and trailer transport.
Tyre Size Converter
Convert old inch tyre sizes to modern metric equivalents — with overall diameter comparison and rim width compatibility check.
Front Ballast Weight Calculator
Calculate the minimum recommended front ballast for a tractor with a rear implement attached, with a full safety check.
O-Ring Size Finder
Find the right O-ring from your measurements — enter ID, OD or CS and instantly see matching metric sizes (DIN 3771).
Pipe Size Reference Chart
BSP nominal vs actual OD, copper tube, hydraulic steel tube and MDPE water pipe — all in one searchable lookup.
BSP Thread Size Chart
Male OD and female ID for every British Standard Pipe size used on fleet and plant hydraulics, 1/8" to 3".
Grease Nipple Thread Identifier
Identify the correct Zerk fitting for your fleet or plant machinery — metric, UNF and BSP standards, by hex size and thread pitch.
Air Compressor Size Calculator
Select your air tools and get a CFM, L/min and tank size recommendation for your fleet workshop.
Generator Size Calculator
Add your equipment, account for motor surge loads and get a minimum kVA recommendation with fuel use estimate.
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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