UK Area & Land Unit Converter
Seamlessly convert between HM Land Registry metric hectares (ha) and square metres (m²) and British customary acres, square feet, roods, and perches.
The British Land Measurement Landscape: Dual Systems in Practice
Property measurement in the United Kingdom exists in a distinct dual reality. In official legal affairs, HM Land Registry (for England & Wales), Registers of Scotland (RoS), and Land & Property Services (Northern Ireland) operate under statutory metrication rules dating back to the Units of Measurement Regulations 1995. Title plans and survey information use metric measurements such as hectares (ha) and square metres (m²), alongside other measurement conventions used in property marketing and historical records.
Yet in commercial practice, agricultural farm leasing, forestry, equestrian smallholdings, and residential property sales across the UK continue to be marketed and negotiated in Acres and Square Feet. Consequently, British solicitors, conveyancers, chartered surveyors (RICS), farmers, and estate buyers must constantly convert between the two systems.
Historic English Units Found on Antique Title Deeds
When examining older freehold conveyances, manorial land grants, or church glebe records, surveyors regularly encounter medieval and Victorian customary measures:
- Acre (ac): Standardized at 4,840 square yards (43,560 square feet or 4,046.856 m²). In 1959, the UK and US signed the International Yard and Pound Agreement, confirming this exact standard across the Commonwealth.
- Rood: Exactly one-quarter of an acre (10,890 square feet, 1,210 square yards, or 1,011.71 m²). A land deed citing "2 Roods" represents exactly half an acre.
- Perch (Pole or Rod): Exactly 1/160th of an acre or 1/40th of a rood (30.25 square yards, 272.25 square feet, or 25.2929 m²). Historically, traditional British allotment gardens leased by local parish councils were standardized at 10 perches (approx 250 square metres), calibrated to supply sufficient vegetables for a family of four.
- Hide: A medieval Anglo-Saxon assessment of taxable arable land, typically encompassing between 60 and 120 acres depending on soil fertility.
Residential Floor Plans: Square Metres vs. Square Feet
In modern British residential real estate, architectural floor plans produced by estate agents typically display both metric and imperial measurements. Internal room dimensions and total gross internal area (GIA) are quoted in both square metres (m²) and square feet (sq ft):
- To convert square metres to square feet: multiply by 10.7639 (e.g., a 70 m² flat equals approximately 753.5 sq ft).
- To convert square feet to square metres: multiply by 0.092903 (or divide by 10.7639).
UK Land & Property Measurement Reference Tables
| Unit Name | Equivalent in Sq Metres | Equivalent in Sq Feet | Equivalent in Acres | Equivalent in Hectares |
|---|---|---|---|---|
| 1 Square Metre (m²) | 1.0000 m² | 10.7639 sq ft | 0.0002471 ac | 0.000100 ha |
| 1 Perch (Pole / Rod) | 25.2929 m² | 272.25 sq ft | 0.006250 ac | 0.002529 ha |
| 10 Perches (Standard Allotment) | 252.9285 m² | 2,722.50 sq ft | 0.062500 ac | 0.025293 ha |
| 1 Rood (1/4 Acre) | 1,011.7141 m² | 10,890.00 sq ft | 0.250000 ac | 0.101171 ha |
| 1 Imperial Acre (ac) | 4,046.8564 m² | 43,560.00 sq ft | 1.000000 ac | 0.404686 ha |
| 1 Hectare (ha) | 10,000.00 m² | 107,639.10 sq ft | 2.471054 ac | 1.000000 ha |
| 1 Square Kilometre (km²) | 1,000,000 m² | 10,763,910 sq ft | 247.1054 ac | 100.0000 ha |
Original Worked Examples for British Property Owners
Converting a 3.5-Acre Paddock to Hectares for Title Registry
A smallholder in the Cotswolds purchases a 3.5-acre grazing paddock and needs to submit the area in hectares to HM Land Registry.
Calculation: 3.5 × 0.404686 = 1.4164 ha
Result: 3.5 acres equals approximately 1.42 hectares (14,164 square metres).
Converting an 82 m² Apartment to Square Feet
A buyer reviewing a leasehold apartment floor plan in Islington wants to know the imperial square footage.
Calculation: 82 × 10.7639 = 882.64 sq ft
Result: 82 square metres equals approximately 883 square feet.
Converting a 120-Hectare Forestry Parcel to Acres
A forestry investor evaluates a commercial timber estate in Perthshire registered with Registers of Scotland as 120 hectares.
Calculation: 120 × 2.4710538 = 296.53 Acres
Result: 120 hectares equals 296.53 acres.
Converting a 1 Rood 20 Perches Deed Entry to Sq Metres
A conveyancer in Somerset reviews a 19th-century church title describing a glebe land parcel of 1 rood and 20 perches.
20 Perches = 20 × 25.2929 = 505.86 m²
Total = 1,011.71 + 505.86 = 1,517.57 m² (0.375 acre)
Result: 1 rood 20 perches equals 1,517.57 m² (16,335 sq ft).
Converting a 220 m² Garden to Square Yards
A homeowner in Hampshire is ordering turf for a 220 square metre rear lawn priced in square yards.
Calculation: 220 ÷ 0.83612736 = 263.12 sq yd
Result: 220 square metres equals approximately 263.1 square yards.
Converting 18 Acres to Square Metres
A farmer in Yorkshire calculates drainage pipe runs over an 18-acre arable field.
Calculation: 18 × 4,046.8564 = 72,843.4 m² (7.28 ha)
Result: 18 acres equals 72,843.4 square metres.