The Fresh Loaf

News & Information for Amateur Bakers and Artisan Bread Enthusiasts

Converting oz. to grams ?

tomsgirl's picture

Converting oz. to grams ?

Sorry if this seems to be a dumb question but I am curious. When converting oz to grams ( I find it easiest in grams with my scale) would you round up? I am not a math whiz so I cheat and look it up. For instance 1 oz = 28.3495g would you leave this at 28 grams? Say it was 28.687 would you round that up to 29 grams? Or should I buy a more precise scale?

GAPOMA's picture

Round up or down, the difference is negligible.  The 0.3495g difference in your first example is equal to 0.0123 oz, or ~1%.  Rounding could make a 0.5g difference (maximum), which is still only 1.6%.  If only everything was 99% accurate.   ;)

- Greg

tomsgirl's picture

Thanks Greg I tend to over think things which just adds to my confusion :)

dwcoleman's picture

I've never had problems scaling recipes when using that measurement.

Now its time to learn your 28 muliplication table.

Chuck's picture

If you round after multiplying, it's completely reasonable (30 ounces = 30 * 28.687 = 860.61 grams, rounded is 860)

But it matters more if you round before multiplying  (30 ounces = 30 * 29 = 870 grams). The error (10 grams in this example) is pretty small though (around 1%).

Many scales can change personalities between ounces and grams if you just press the right button at the right time. Sometimes it's something pretty weird, for example a double press of a button labeled something else within five seconds of having turned the scale off. So hunt for those directions, or search around on the web, or contact the manufacturer before you buy anything. Don't just assume your scale really is as stupid as it seems.

Janetcook's picture

I have a kitchen caluculator that does it all for me :-)  Converts from oz to g; c to f...all sorts of nifty things.

Before I found it I went with the 28g = 1 oz as others have said.


Maverick's picture

You could just type it into google and it will convert for you. E.g. just type: 30 oz in g

Better yet, if you take the recipe in ounces and convert it into baker's percentages, then the rounding won't matter because you can just plug in whatever weight measurement you want (and scale as you woul like too).

suave's picture

I consider baking ounce to be 30 g.  For the most part this completely removes the need for a calculator.

tomsgirl's picture

Thank you all for your comments. I guess I will continue with what I have been doing.