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Calculate definite integrals using Simpson's Rule, Trapezoidal Rule, and Midpoint Rule

Calculate subnet information by dividing a network into smaller subnets based on required hosts or number of subnets with our free subnet calculator.

Track current moon phase, illumination percentage, moonrise and moonset times. View upcoming moon phases and lunar calendar.

Convert between different time units - seconds, minutes, hours, days, weeks, months, and years. Free online time conversion calculator.