I don't have a scale, so I cook using such a tool to measure volume (millilitres): When a recipe tells me to add 40g of granulated sugar, I check websites like this one to perform the conversion.
Cook's Convertor on the App Store
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Converting Between Metric and Imperial Measures - Pastry & Baking
Useful Units Recipe Converter - Apps on Google Play
Useful Units Recipe Converter - Mobile App for Android and iOS
Handy conversions and equivalents for easier cooking
Useful Units Recipe Converter on the App Store
Kitchen Calculator
Useful Units Recipe Converter on the App Store
Cooking Units Converter on the App Store
Recipe Convert Free - Apps on Google Play
Useful Units Recipe Converter - Mobile App for Android and iOS
Converting Between Metric and Imperial Measures - Pastry & Baking
Useful Units Recipe Converter - Mobile App for Android and iOS