Woman's bonkers trick for measuring size of new sofa for her home (and a lot of us are guilty of doing the same!)

A woman has shared her hilarious method for calculating the size of objects without having to use a measuring tape - and it involves using some of the finest 'girl math' techniques.

People from around the world were left in hysterics after a number of TikTokers revealed their 'relatable' technique for measuring, which involved using various parts of their bodies - dubbed 'girl measuring'.

One British TikToker, Lucy Renouf, took to the app where she shared her tip for measuring a wall space for a new frame.

Without the help of a proper measuring device to hand, Lucy opted for the next best thing - her arms.

In the video she was seen with her arms outstretched using the length of her limbs to measure out the length of her wall.

The video proceeded with the influencer cautiously tiptoeing away are carefully as possibly, her arms holding the precise size of wall space.

Focusing within every inch of her life, she then crept away, having found her precise measurements.

The influencer captioned the amusing video: 'Unsure where I’d be without it to be honest.'

And she clearly wasn't the only one guilty of using the amusing 'girl math measurement' technique.

Elsewhere on the app, 'girl measuring' brings up hundreds of similar clips of women using their arms as measuring tapes.

Several who posted the tongue-in-cheek technique joked about using their trusty arms to measure everything from TVs, to dressing tables, and an array of household appliances - all without the help of usual metrics.

Commenters resonated with the amusing video with many writing that it was 'so accurate'.

'It works 50 per cent of the time,' one wrote underneath the video, while another advocate for the technique said, 'I do this all the time.'

Though one pointed out a common problem that could get in the way of the usually faultless method, writing 'it's all well and good until your nose gets itchy en route.'

Another commenter wrote: 'And then the guy at the store asks you for measurements and you only have “girl measurements” as answers - story of my life.' 

Below other similar clips, many fellow girl measurers shared their experiences, 'happy to know this isn't just me.'

'Look man. Sometimes you just don’t have a measuring tape on hand,' another joked.

'I always measure in feet (the number of my own feet),' another amused viewers joked.

It's not the first time that women have joked about using 'girl math' to solve various equations - or to justify any amount of spending. 

Two years ago, one woman went viral after revealing she thinks of anything she pays less than $5 for as 'free'.

Samantha Jane, 28, from Toronto took to TikTok to share the concept of 'girl math' - which she says helps her to make financial decisions.

She said girl math is a 'fun logic' and not a 'silly trend'.

'I know we've been talking a lot about girl dinner,' the real estate developer says in the video, 'but I really think we should focus our attention on girl math.'

She then gives examples of 'maths' including: 'Anything under $5 feels like it's pretty much free.'

'[If I] return something at Zara for $50 [and] bought something else for $100, it only cost me $50.'

'Tickets that I buy months in advance, I show up to the concert and I'm like, 'this was like a free concert, right?''.

Taking to the comments, hundreds of women agreed with Samantha.

'Spend an extra £20 to avoid paying £5 delivery,' said one.

'If something is on 70 per cent off sale and you don't buy it, you're losing money,' wrote another.

'If I pay with cash it didn't cost anything because it didn't come out of my account,' commented a third.

'If I bought the tickets for the whole group and they don't pay me back till after the concert I actually made money by going,' joked another.