Before you start to calculate 210 Teaspoons, you should know the conversion rate between Teaspoons and Cup.
The rate is 0.025067708333333 and the math equation is 210 X 0.025067708333333 = 5.26421875 .
Quick conversion chart of Teaspoons to Cups
1 Teaspoon to Cup = 0.025067708333333 Cup5 Teaspoon to Cup = 0.12533854166667 Cup10 Teaspoon to Cup = 0.25067708333333 Cup20 Teaspoon to Cup = 0.50135416666667 Cup30 Teaspoon to Cup = 0.75203125 Cup40 Teaspoon to Cup = 1.0027083333333 Cup50 Teaspoon to Cup = 1.2533854166667 Cup75 Teaspoon to Cup = 1.880078125 Cup100 Teaspoon to Cup = 2.5067708333333 Cup