Convert any length in seconds. This tool instantly switches between millimetres (mm), centimetres (cm), metres (m), kilometres (km), inches (in), feet (ft), yards (yd), and miles (mi). Popular conversions like ft → m, mm → cm, and in → cm are one tap away. Choose decimal places for precise results you can copy or print.
• Feet to metres (ft → m)
• Metres to feet (m → ft)
• Inches to centimetres (in → cm)
• Centimetres to inches (cm → in)
• Millimetres to centimetres (mm → cm)
• Kilometres to miles (km → mi)
• Miles to kilometres (mi → km)
• 1 mm = 0.001 m (1 m = 1,000 mm)
• 1 cm = 0.01 m (1 m = 100 cm)
• 1 m = 1 m
• 1 km = 1,000 m (1 m = 0.001 km)
• 1 in = 0.0254 m (1 m ≈ 39.3701 in)
• 1 ft = 0.3048 m (1 m ≈ 3.28084 ft)
• 1 yd = 0.9144 m (1 m ≈ 1.09361 yd)
• 1 mi = 1,609.344 m (1 m ≈ 0.000621371 mi)
• 1 nmi = 1,852 m (1 m ≈ 0.000539957 nmi)
value in target = value in source × (metres per source) ÷ (metres per target)
Examples
• Feet to metres: m = ft × 0.3048 (6 ft = 1.8288 m)
• Metres to feet: ft = m ÷ 0.3048 (2 m ≈ 6.56168 ft)
• Inches to centimetres: cm = in × 2.54 (10 in = 25.4 cm)
• Millimetres to centimetres: cm = mm ÷ 10 (35 mm = 3.5 cm)
• Kilometres to miles: mi = km ÷ 1.609344 (5 km ≈ 3.10686 mi)
Q: How do I convert feet to metres?
A: Multiply feet by 0.3048. Example: 10 ft × 0.3048 = 3.048 m.
Q: How many centimetres are in an inch?
A: Exactly 2.54 cm. Example: 12 in × 2.54 = 30.48 cm.
Q: What’s the difference between metres and yards?
A: 1 m = 1.09361 yd. A yard is slightly longer than a metre.
Q: How do I convert km to miles?
A: Divide kilometres by 1.609344. Example: 15 km ≈ 9.32057 mi.
Q: Are these conversion factors exact?
A: SI relationships (mm, cm, m, km) are exact; the inch is defined as exactly 2.54 cm. Derived values (ft, yd, mi) follow from those definitions.
Q: Can I copy or print my results?
A: Yes—copy the numeric output and, if your page includes a chart, print the quick-reference section for offline use.
Q: Do I need internet for the conversion?
A: The calculator runs in your browser. Once loaded, it works instantly without sending your data anywhere.