| 0in² | 0m² |
| 1in² | 0.00064516m² |
| 2in² | 0.00129032m² |
| 3in² | 0.00193548m² |
| 4in² | 0.00258064m² |
| 5in² | 0.0032258m² |
| 6in² | 0.00387096m² |
| 7in² | 0.00451612m² |
| 8in² | 0.00516128m² |
| 9in² | 0.00580644m² |
| 10in² | 0.0064516m² |
| 11in² | 0.00709676m² |
| 12in² | 0.00774192m² |
| 13in² | 0.00838708m² |
| 14in² | 0.00903224m² |
| 15in² | 0.0096774m² |
| 16in² | 0.01032256m² |
| 17in² | 0.01096772m² |
| 18in² | 0.01161288m² |
| 19in² | 0.01225804m² |
| 20in² | 0.0129032m² |
| 21in² | 0.01354836m² |
| 22in² | 0.01419352m² |
| 23in² | 0.01483868m² |
| 24in² | 0.01548384m² |
| 25in² | 0.016129m² |
| 26in² | 0.01677416m² |
| 27in² | 0.01741932m² |
| 28in² | 0.01806448m² |
| 29in² | 0.01870964m² |
| 30in² | 0.0193548m² |
| 31in² | 0.01999996m² |
| 32in² | 0.02064512m² |
| 33in² | 0.02129028m² |
| 34in² | 0.02193544m² |
| 35in² | 0.0225806m² |
| 36in² | 0.02322576m² |
| 37in² | 0.02387092m² |
| 38in² | 0.02451608m² |
| 39in² | 0.02516124m² |
| 40in² | 0.0258064m² |
| 41in² | 0.02645156m² |
| 42in² | 0.02709672m² |
| 43in² | 0.02774188m² |
| 44in² | 0.02838704m² |
| 45in² | 0.0290322m² |
| 46in² | 0.02967736m² |
| 47in² | 0.03032252m² |
| 48in² | 0.03096768m² |
| 49in² | 0.03161284m² |
| 50in² | 0.032258m² |
| 51in² | 0.03290316m² |
| 52in² | 0.03354832m² |
| 53in² | 0.03419348m² |
| 54in² | 0.03483864m² |
| 55in² | 0.0354838m² |
| 56in² | 0.03612896m² |
| 57in² | 0.03677412m² |
| 58in² | 0.03741928m² |
| 59in² | 0.03806444m² |
| 60in² | 0.0387096m² |
| 61in² | 0.03935476m² |
| 62in² | 0.03999992m² |
| 63in² | 0.04064508m² |
| 64in² | 0.04129024m² |
| 65in² | 0.0419354m² |
| 66in² | 0.04258056m² |
| 67in² | 0.04322572m² |
| 68in² | 0.04387088m² |
| 69in² | 0.04451604m² |
| 70in² | 0.0451612m² |
| 71in² | 0.04580636m² |
| 72in² | 0.04645152m² |
| 73in² | 0.04709668m² |
| 74in² | 0.04774184m² |
| 75in² | 0.048387m² |
| 76in² | 0.04903216m² |
| 77in² | 0.04967732m² |
| 78in² | 0.05032248m² |
| 79in² | 0.05096764m² |
| 80in² | 0.0516128m² |
| 81in² | 0.05225796m² |
| 82in² | 0.05290312m² |
| 83in² | 0.05354828m² |
| 84in² | 0.05419344m² |
| 85in² | 0.0548386m² |
| 86in² | 0.05548376m² |
| 87in² | 0.05612892m² |
| 88in² | 0.05677408m² |
| 89in² | 0.05741924m² |
| 90in² | 0.0580644m² |
| 91in² | 0.05870956m² |
| 92in² | 0.05935472m² |
| 93in² | 0.05999988m² |
| 94in² | 0.06064504m² |
| 95in² | 0.0612902m² |
| 96in² | 0.06193536m² |
| 97in² | 0.06258052m² |
| 98in² | 0.06322568m² |
| 99in² | 0.06387084m² |
The square inch is a unit of area and is an imperial unit with the symbol in².
One square inch is equal in area to a square with edges one inch in length.
The square inch is a common unit of measurement in the UK and US.
The square metre is a unit of area and is an SI derived unit with the symbol m².
It was introduced in 1954 when the International System of Units was established and was derived directly from one of the original 6 base units - the metre (m).
It can be prefixed with any of the SI symbols that multiply it up or down such as km² (square kilometre) or µm2 (square micrometre). It is the most commonly used unit of area and is recognised all over the world.