Minecraft Circle Chart - Diameters 5 to 21 With Block Counts A reliable circle chart saves more time than any building trick. Print it, pin it, or keep it open on a second screen: every diameter below lists the exact outline and filled block counts, so you can gather materials before you build and never run short halfway up a tower. Block counts (outline / filled): Diameter 5: outline 12 blocks, filled 21 blocks. Diameter 7: outline 16 blocks, filled 37 blocks. Diameter 9: outline 24 blocks, filled 69 blocks. Diameter 11: outline 28 blocks, filled 97 blocks. Diameter 13: outline 36 blocks, filled 137 blocks. Diameter 15: outline 40 blocks, filled 177 blocks. Diameter 17: outline 48 blocks, filled 225 blocks. Diameter 19: outline 52 blocks, filled 293 blocks. Diameter 21: outline 56 blocks, filled 349 blocks. Small circles (5 to 9) suit wells, fountains, fire pits and small turrets. Medium circles (11 to 17) are the sweet spot for towers and lighthouses. Large circles (19 and up) work for castle keeps, domes and spawn builds. When in doubt, build the outline on flat ground first and walk around it - proportions are easier to judge from a distance. Plan your own circle here: https://circlecraftlab.com/