There is another factor about the state pension which you need to be aware of. It relates to the number of contributing years you have - as these might not be as they seem.
If you were "contracted out", then you won't get full contributions for the period that you were out for.
You can do an online check and I'd urge that you do as I got a shock when I did it recently. My record came back and said that I'd got 43 years worth of contributions in the system, but needed another 3 years worth still to earn before I'd earned my full state pension.
Check it soon as then you might have time to something about it. I'm lucky in that I've still got time left to catch-up before my state pension is due at 66.
Hope this helps - Rob
While factually correct, these comments omit a few salient points that are also worth considering ..
If you are "contracted out" then .. by definition.. you are part of a workplace pension scheme that is investing the "contracted out" portion of your National Insurance Payments along with any personal or employer contributions.
The reality is that the investment returns on these funds is probably far higher (although in theory could be less, but in that case its a REALLY bad scheme you are in) than the difference between a "full" state pension and the "contracted out" state pension.
You are not "losing out" in any way, and are probably better off when you add your state pension to the higher workplace pension you get due to the additional "contracted out" payments made over the years.
If you make the additional payments to "top up" the contribution levels then, yes, you'll be better off in income terms, but the additional payments can be quite high, so should be viewed as short term investment with a low return.
HTH