Weighing your rice and water is the best way to make perfect rice every time. Forget lackadaisical methods involving fingers and knuckles—they are unlikely to produce consistent results.
Regardless of the proportions you prefer, the secret is the method rather than the amount. Find your preference based on the rice you buy and record your preferred weights. The best way to experiment is to use the same amount of rice each time, such as 100 g; then vary the weight of water you use to explore variations in texture. Remember to wash the rice and be sure to drain it for an equal duration before each experiment.
25 minutes total: 5 minutes attended, 20 minutes unattended
340 g (servings 2 –4)