Calculate gas mileage as MPG (miles per gallon) from distance driven and fuel consumed, with a metric L/100km view and trip-cost math. Numbers never leave your device — every calculation runs locally in your browser.
Content reviewed October 2026 · About Toolzum
Calculate the exact duration between two times. Handles overnight time spans and displays results in hours, minutes, and seconds. Numbers never leave your device — every calculation runs locally in your browser.
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Calculate total cost of software licenses by seats, price per seat, and billing cycle with annual discount. Budget and plan your SaaS subscription costs. Numbers never leave your device — every calculation runs locally in your browser.
Calculate Monthly Recurring Revenue from customer count and average revenue per account (ARPA), with monthly, annual, and ARPU readouts. Example: 120 customers at $49 ARPA = $5,880 MRR. Numbers never leave your device — every calculation runs locally in your browser.
Two views via the Unit switch: US (miles, gallons, MPG) and metric (km, liters, L/100km). No UK imperial-gallon view — convert imperial gallons to US gallons (×1.2) by hand first.
Add fuel price for total trip cost plus per-mile (US) or per-km (metric) cost.
Driving style, load, and conditions swing real mileage widely.
No — calculation runs locally in your browser, free with no signup.
300 miles on 10 gallons at $3.50 gives 30.0 mpg, $35.00 of fuel, $0.117 per mile. Flip to Metric and the same inputs read as 37.9 litres over 482.8 km = 7.8 L/100km (3.78541 L/gal, 1.60934 km/mi).