Who is this collection for?
It is for students, freelancers, households, and anyone who wants a quick browser-based tool to make a small planning or money decision.
Collection
Everyday Planning Tools
Use calculators and planning helpers for money, workload, studying, and daily decisions when a spreadsheet feels like overkill.
10 tools in this category
← HomeWhy this collection exists
TeaFun has several tools that are less about one-off math and more about making the next decision. This collection brings together calculators and planners for money, tasks, studying, and personal admin.
Common use cases
- Work out what a job offer really pays per hour after PTO, then draft the cover letter to apply for it — without opening a spreadsheet or a word processor.
- Split a restaurant bill and tip fairly, generate an invoice for freelance work, or check your net worth when you are weighing up a purchase.
- Plan a study week against a GPA target, estimate how long an article will take to read, and break a stalled to-do list into a workable order.
What This Collection Covers
This is a mixed bag of calculators and planners that share one trait: each one ends in a decision rather than just a number. Some handle money — salary conversions, tipping, freelance invoices, net-worth snapshots. Others handle personal admin and study — GPA targets, reading-time estimates, task prioritisation, cover letters, daily calorie needs, even a rough room floor plan. They are grouped here because they tend to show up in the same kind of moment: you need a quick, defensible figure to move forward, and a full spreadsheet or a dedicated app would be more setup than the question deserves. Everything runs in the browser with no sign-in.
How to Use This Collection
Pick the tool that matches the decision in front of you. For money questions, the salary calculator translates between annual and hourly so you can compare offers honestly, the tip calculator splits a bill, and the invoice generator produces a document you can send. For planning, the ADHD task prioritiser turns a messy list into an order you can start on, the GPA calculator works backward from a target grade, and the reading-time estimator sets expectations before you commit to an article. Several of these pair naturally — estimate your real hourly rate, then write the cover letter; check your net worth, then plan the spend.
Why Keep These in One Place
Everyday decisions rarely need precision to four decimal places; they need a reasonable number fast, with the assumptions visible so you can sanity-check them. A dedicated finance app or project manager is great for ongoing tracking but heavy for a single question on a Tuesday afternoon. These tools fill that gap: open, type, read the result, close. Because they are browser-based and account-free, there is nothing to set up and nothing stored — your salary, your grades, and your invoice details stay on your device. They will not replace a proper budget or a real CAD program, and they are not meant to. They are for the quick call you need to make right now.
Featured tools
Salary Calculator
Convert salary to hourly rate instantly. Calculate annual, monthly, weekly, daily, and hourly pay with configurable working hours and leave days.
Tip Calculator
Calculate tips and split bills instantly. Choose your currency, add an optional service charge, and share the per-person breakdown.
Invoice Generator
Create a client-ready invoice with your branding, taxes, and line items, keep drafts locally, and download a clean PDF with no watermark.
Net Worth Tracker
Track assets, liabilities, and net worth locally with flexible account fields, currency selection, history snapshots, and CSV export.
GPA / Final Grade Calculator
Calculate the final exam score you need, run GPA what-if scenarios across multiple grading systems, and export a verdict card locally.
ADHD Task Prioritiser
Paste your task list, answer three low-friction questions, and get one next task to do right now.
Reading Time Estimator
Estimate reading and speaking time instantly. Paste any text to get word count, character count, reading time, and speaking time — CJK-aware.
Cover Letter Builder
Build a tailored cover letter with three templates, instant preview, and PDF download in your browser.
TDEE Calculator
Estimate your daily calories with Mifflin-St Jeor, compare Harris-Benedict, and get macro targets you can bookmark.
Floor Plan Tool
Lay out a room in 2D, drag furniture into place, rotate selected items, and export a clean PNG with no account or watermark.
FAQ
Why group these tools together?
They often appear in the same real-world flow: estimate the number, draft the output, then move to the next planning step without losing context.
Do these tools save my numbers?
No. Each tool calculates locally in your browser and keeps nothing after you close the tab. Your salary, invoice details, grades, and net-worth figures are never uploaded or stored on a server.
Are the results precise enough to rely on?
They are good for quick, informed decisions, and most tools show the assumptions behind the figure so you can adjust them. For tax filing, formal financial planning, or construction, treat the output as a starting estimate and confirm with the appropriate professional tool.