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All tools(42)
Fuel Cost Calculator
Estimate fuel used and trip cost from distance, efficiency and price.
Speed Calculator
Solve speed, distance or time from the other two — km/h, m/s, mph.
Unit Converter
Length, weight, temperature, area, volume & speed — all in one.
Roman Numerals Converter
Convert decimal ↔ Roman (1–3999) — two-way, validated.
Timezone Converter
See one instant across the world's major timezones.
File Size Converter
Convert between B, KB, MB, GB, TB & PB — 1024-based.
Aspect Ratio Calculator
Find the missing dimension for any aspect ratio.
Currency Formatter
Format any number as a currency — 18 currencies & compact notation.
Shoe Size Converter
Convert adult shoe sizes between US, EU, UK and centimeters.
Ring Size Converter
Diameter or circumference → US, UK, EU and ISO ring sizes.
Cooking Converter
Convert cups, tbsp, tsp, ml, fl oz, liters and grams (water-based).
DPI / PPI Calculator
Compute pixel density from resolution & diagonal — and reverse it.
