The formula to a successful long-distance relationship for students has been revealed

He's taken into account how many miles they spend travelling to see each other (m), how many texts are exchanged (t), the number of calls (c) as well as the amount of time they confess their love (l).

(v x mₙ) + (t x c) + (l x r)

           d + s

The weighted formula reflects the effort put in by a couple (top line numerator of the equation) against the challenges (bottom line denominator of the equation).

And the higher your Long-Distance Love index, the more likely your relationship will succeed.

Sarah Rosier, Customer Experience Director for National Express, which commissioned the formula, said: "This autumn has seen high school sweethearts parting ways and going to separate universities.

“So, we wanted to find the perfect formula to help them stay together.

“Maintaining a long-distance relationship isn’t easy, particularly when you’re also studying and living that lifestyle as well.”

The formula comes after research of 1,000 adults aged 18-30 who are or were in a long-distance relationship while studying found they typically only saw their partners three times per month.

And they had to travel an average of 171.3 miles to do so.

As a result, every month costs these couples almost £170 in travel costs, moving between destinations to catch up with their loved one.

But 85 per cent reckon they would have seen – or would see their long-distance love more if there were more affordable travel options.

The majority of these journeys were completed by train (72 per cent), although 30 per cent would drive and 27 per cent would catch a succession of local buses.

Sarah added: “Our research shows that it’s clear that the cost of a long-distance relationship can cause friction.

“Constant train travel can really add up, which is why hopping on a coach between cities is often far more affordable.

“With hundreds of frequent coaches serving destinations across the UK, it means students have one less thing to worry about and can make the most of their budget while spending precious time with their long-distance loves.”

Every day, the typical respondent sent their other half a whopping 68 messages and would speak with them on the phone four times.

And they’d end up skipping four and a half days’ worth of lectures or classes because they were away visiting their long-distance love.

But the research, carried out via OnePoll, found 72 per cent said their long-distance relationship has worked out and they’re still together.

According to those involved in long-distance relationships at university, the secrets of success when it comes to love, were deemed to be calls every day (69 per cent), a constant stream of texts (61 per cent) – and the knowledge that the separation isn’t permanent (62 per cent).

While top tips to staying happy included keeping positivity levels up (53 per cent), supporting each other’s ambitions (47 per cent) and sharing daily updates (44 per cent).

Bobby Seagull added: “It was great working with National Express to put together this formula to help long-distance loves stay together while they are at university.

“If they stick to the numbers there is a high chance they can make this work.”

LONG-DISTANCE LOVE INDEX =

(v x mₙ) + (t x c) + (l x r)

           d + s

v = visits per month (2.84)

mₙ = normalised miles travelled (actual ÷ “too far” threshold): 171 ÷ 256 ≈ 0.67

t = daily messages (68)

c = daily calls (4.08)

l = daily “I love you”s (7.54)

r = resilience factor (e.g. proportion who agree long-distance makes them appreciate time together: 86% = 0.86)

d = distance difficulty (cost & travel barrier proxy e.g. monthly spend £168 ÷ £277 threshold ≈ 0.61)

s = stress factor (proportion who found it expensive & said it nearly broke them up: 0.68 × 0.44 ≈ 0.30)

Using data from the survey

LDL = (2.84 x 0.67) + (68 x 4.08) + (7.54 X 0.86)

0.61 + 0.30

= 285.83        

     0.91

= 314 (rounded figure)

If your relationship scores over 300 on the Long-Distance Love index, your chances of success are high (72 per cent of students say their long-distance relationship did work out)

Top 10 keys to happiness in a long-distance relationship:

1. Staying positive  53%
2. Supporting each other’s ambitions   47%
3. Sharing daily updates   44%
4. Being open about the challenges     43%
5. Planning visits in advance to have something to look forward to   44%
6. Talking about the future      41%
7. Remembering the long-distance won’t be forever  41%
8. Plenty of video calls   40%
9. Relishing the time when you’re together   37%
10. Having a constant flow of texts     35%