The Complete Guide to Feet Conversion: Linear, Area & Volume
Whether you are a builder calculating material quantities, a student working through a physics problem, or simply trying to figure out how to convert 145 cm to feet, measurement conversion is a daily challenge. The term "feet" covers three completely different dimensions — linear feet, square feet, and cubic feet — and each dimension follows its own conversion rules.
This complete guide explains every major feet conversion with worked examples, reference tables, and direct links to our online tool above. By the end, you will know exactly how to use our Feet Converter for any unit — from converting centimeters to feet, all the way to converting square feet to cubic yards.
Part 1: Linear Feet Conversions (1D Measurements)
Linear conversions involve a single dimension: a straight-line distance. All values in this section concern the standard international foot, which is exactly 0.3048 metres.
How to Convert Centimeters to Feet (and Feet to cm)
The most searched linear query is how to convert 145 cm to feet, closely followed by convert 1.6 meters to feet and convert 8 meters to feet. The rule is the same in all cases:
- cm → feet: Divide centimeters by
30.48 - meters → feet: Multiply meters by
3.28084 - feet → cm: Multiply feet by
30.48 - feet → meters: Multiply feet by
0.3048
| Measurement | Feet | Feet + Inches |
|---|---|---|
| 145 cm | 4.757 ft | 4 ft 9.09 in |
| 1.6 m (160 cm) | 5.249 ft | 5 ft 2.99 in |
| 8 m (800 cm) | 26.247 ft | 26 ft 2.97 in |
| 1 m (100 cm) | 3.281 ft | 3 ft 3.37 in |
| 2 m (200 cm) | 6.562 ft | 6 ft 6.74 in |
👉 Use our Feet Converter tool above to calculate any cm or meter value in real time — no formula memorization needed.
How Do You Convert Feet to Inches?
The question how do you convert feet to inches consistently receives around 880 monthly searches. The answer is simple: multiply by 12, since there are exactly 12 inches in every foot.
Example: 5.5 feet × 12 = 66 inches.
To go in reverse and convert inches to feet, divide by 12. Example: 66 inches ÷ 12 = 5.5 feet.
For mixed measurements (feet and inches), first convert the inches portion: 5 feet 9 inches = 5 + (9 ÷ 12) = 5.75 feet.
How to Convert Feet to Km (Kilometers)
The query convert feet to km is popular in running and cycling communities, where GPS data often uses feet while race distances are expressed in kilometers.
- feet → km: Multiply by
0.0003048(or divide by 3,280.84) - km → feet: Multiply by
3,280.84
Example: A 5K race is 5 km. 5 × 3,280.84 = 16,404.2 feet.
How to Convert Yards to Feet
This conversion appears in construction, fabric, and landscaping. Since 1 yard = 3 feet:
- yards → feet: Multiply by
3 - feet → yards: Divide by
3
Part 2: Square Feet Conversions (2D Area Measurements)
Area measurements use a two-dimensional unit. This section covers the most-searched questions concerning square feet, including converting to and from square inches, square yards, and linear feet.
How to Convert Square Inches to Square Feet
With over 1,000 monthly searches, how to convert square inches to square feet is the top area-conversion query on our list. The key fact: there are 12 inches in a foot, so there are 12 × 12 = 144 square inches in one square foot.
- sq inches → sq feet: Divide by
144 - sq feet → sq inches: Multiply by
144
| Square Inches | Square Feet |
|---|---|
| 144 in² | 1 ft² |
| 288 in² | 2 ft² |
| 1,000 in² | 6.944 ft² |
| 1,440 in² | 10 ft² |
How to Convert Square Feet to Square Yards
The query how to convert square feet to square yards is essential for flooring, carpet, and landscaping projects. Since 1 yard = 3 feet, it follows that 1 square yard = 3 × 3 = 9 square feet.
- sq ft → sq yards: Divide by
9 - sq yards → sq ft: Multiply by
9
Example: A room of 270 sq ft ÷ 9 = 30 square yards of carpet needed.
How to Convert Square Feet to Linear Feet
This is one of the most misunderstood conversions, because it mixes area (2D) with length
(1D). It is only meaningful when the material has a fixed, known width — for example, planks,
rolls of fabric, turf, or piping.
The formula is: Linear Feet = Square Feet ÷ Material Width (in feet).
Example: You need to cover 200 sq ft using flooring planks that are 0.5 ft (6 inches)
wide.
200 ÷ 0.5 = 400 linear feet of planking.
💡 Tip: Our converter tool handles linear feet and area conversions instantly. Just enter your value and choose the target unit.
Part 3: Cubic Feet Conversions (3D Volume Measurements)
Volume measurements are the most complex because they involve three dimensions. This section addresses the relationships between cubic feet, cubic yards, square feet, cubic inches, and litres per minute — all highly searched topics.
How to Convert Cubic Feet to Square Feet
This conversion requires knowledge of the third dimension (height or depth). Volume cannot be automatically converted to area without it. The formula is:
Square Feet = Cubic Feet ÷ Height (ft)
Example: A tank holds 90 cubic feet of water and is 3 feet deep.
90 ÷ 3 = 30
square feet of base area.
The reverse — sq ft to cubic ft — is: Cubic Feet = Square Feet × Depth (ft). This is the formula used when calculating concrete slab volumes, soil fills, or water reservoir capacity.
How to Convert Square Feet to Cubic Yards
This is essential for material estimation in landscaping and construction (mulch, gravel, concrete). There are 27 cubic feet in 1 cubic yard (3 ft × 3 ft × 3 ft).
Formula: Cubic Yards = (Square Feet × Depth in feet) ÷ 27
Example: A lawn of 500 sq ft needs a 4-inch (0.333 ft) depth of mulch.
(500 × 0.333)
÷ 27 = 166.5 ÷ 27 = 6.17 cubic yards.
| Area (sq ft) | Depth 2 in (0.167 ft) | Depth 4 in (0.333 ft) | Depth 6 in (0.5 ft) |
|---|---|---|---|
| 100 | 0.62 yd³ | 1.23 yd³ | 1.85 yd³ |
| 250 | 1.54 yd³ | 3.09 yd³ | 4.63 yd³ |
| 500 | 3.09 yd³ | 6.17 yd³ | 9.26 yd³ |
| 1,000 | 6.17 yd³ | 12.35 yd³ | 18.52 yd³ |
How to Convert Cubic Inches to Cubic Feet
Since 1 foot = 12 inches, a cubic foot is 12 × 12 × 12 = 1,728 cubic inches.
- cubic inches → cubic feet: Divide by
1,728 - cubic feet → cubic inches: Multiply by
1,728
Example: An engine has a displacement of 302 cubic inches. 302 ÷ 1,728 = 0.175 cubic feet.
How to Convert CBM to Cubic Feet
CBM stands for Cubic Meter. Widely used in shipping and logistics for cargo volume. Since 1 meter = 3.28084 feet, it follows that 1 CBM = 35.3147 cubic feet.
- CBM → cubic feet: Multiply by
35.3147 - cubic feet → CBM: Divide by
35.3147
Example: A 20-foot shipping container has approximately 33.2 CBM of cargo space. 33.2 × 35.3147 = 1,172.4 cubic feet.
How to Convert Litres Per Minute to Cubic Feet Per Minute (CFM)
This flow-rate conversion is used in HVAC, plumbing, and industrial engineering. One litre is 0.001 cubic metres, and since 1 cubic foot = 28.3168 litres:
- litres/min → CFM: Divide by
28.3168 - CFM → litres/min: Multiply by
28.3168
Example: A pump delivers 150 litres per minute. 150 ÷ 28.3168 = 5.30 CFM.
Part 4: Converting Newton-Metres (Nm) to Pound-Feet (lb·ft) — Torque
The query convert nm to pounds feet is popular in the automotive world, where engine torque specs are often given in Newton-metres in European specs and pound-feet in American specs. Despite the unit name, lb·ft is a torque unit, not a length unit.
Formula: 1 Nm = 0.737562 lb·ft
- Nm → lb·ft: Multiply by
0.737562 - lb·ft → Nm: Multiply by
1.35582
| Newton-Metres (Nm) | Pound-Feet (lb·ft) |
|---|---|
| 100 Nm | 73.76 lb·ft |
| 200 Nm | 147.51 lb·ft |
| 350 Nm | 258.15 lb·ft |
| 500 Nm | 368.78 lb·ft |
| 700 Nm | 516.29 lb·ft |
Frequently Asked Questions
How do you convert feet to inches?
Multiply the number of feet by 12. Example: 6.5 feet × 12 = 78 inches. To convert inches back to feet, simply divide by 12.
How to convert 145 cm to feet?
Divide 145 by 30.48. The result is approximately 4.757 feet, or 4 feet and 9.09 inches. Use our converter above to get the exact result instantly.
How do you convert square inches to square feet?
Divide the square-inch value by 144. This is because 1 square foot equals 12 inches × 12 inches = 144 square inches.
How to convert square feet to square yards?
Divide the square-feet value by 9. Since 1 yard = 3 feet, one square yard = 3 × 3 = 9 square feet.
How to convert square feet to linear feet?
Divide total square feet by the material's width in feet. This conversion only works when a fixed width is known (e.g., planks, carpet rolls). Formula: Linear ft = Sq ft ÷ Width (ft).
How do you convert cubic feet to square feet?
Divide the cubic footage by the height (depth) in feet: Sq ft = Cu ft ÷ Height (ft). You need to know one of the three dimensions to complete the conversion.
How to convert feet to km?
Multiply by 0.0003048. Or divide the number of feet by 3,280.84. Example: 5,000 feet × 0.0003048 = 1.524 km.
How to convert square feet to cubic yards?
Multiply area (sq ft) by depth (ft) to get cubic feet, then divide by 27. Formula: Cu yd = (Sq ft × Depth ft) ÷ 27.
How to convert litres per minute to cubic feet per minute?
Divide litres per minute by 28.3168. Example: 100 L/min ÷ 28.3168 = 3.531 CFM.
How to convert Nm (Newton-metres) to pound-feet?
Multiply Newton-metres by 0.737562. Example: 400 Nm × 0.737562 = 295 lb·ft of torque.