1 exanewton is equal to 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000 yoctonewton. To convert from exanewton to yoctonewton, multiply by 999,999,999,999,999,900,000,000,000,000,000,000,000,000 or divide by 0.000000000000000000000000000000000000000001.