All-in-One Tools Collection

A broad collection of online tools for development, AI, design, and productivity tasks.

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Convert kilograms to grams with configurable decimal precision

Estimate total study hours, daily study targets, and schedule feasibility from topics, difficulty, and available time

Calculate a weighted course grade from assignment scores and category weights

Convert points earned and total points into a test score percentage, points lost, and letter grade

Calculate weighted GPA from credits, grades, and course rigor bonuses for honors, AP, or IB classes

Calculate credit-weighted GPA from course names, credit hours, and letter or numeric grades

Calculate residuals, absolute errors, SSE, MSE, and RMSE from actual and predicted values or a linear equation

Find slope, y-intercept, and line equation from two points or multiple paired observations

Calculate the standard error of the mean from raw sample values or summary statistics

Calculate adjusted R squared from R squared, sample size, and predictor count

Analyze two categorical factors and their interaction with a two-way ANOVA table

Run a paired nonparametric Wilcoxon signed-rank test from paired samples or differences