Contact NumeraHub

Report an issue, request a correction, or share feedback

Calculator accuracy, outdated official data, broken functionality, unclear explanations, and mobile usability problems can be reported directly. Detailed reports make it easier to reproduce the issue, verify the calculation, and publish a reliable correction.

Open the contact form Email NumeraHub

Accuracy reports prioritized Official source updates welcomed Technical issues reviewed Human correction responsibility

Calculation Incorrect totals, formulas, schedules, or inconsistent results

Source update Changed official rates, limits, thresholds, or program rules

Technical support Broken buttons, layouts, charts, exports, or mobile behaviour

Clarity Unclear assumptions, warnings, explanations, or decision guidance

Choose the right contact path

What you can contact NumeraHub about

The most useful messages identify a specific page, result, source, or technical problem. General feedback is welcome, but detailed reports are easier to investigate.

CALC

Calculator result or formula

Report an incorrect payment, total, ratio, schedule, balance, comparison, tax result, or output that does not match the entered information.

DATA

Outdated official information

Share an updated government, regulator, tax-authority, benefit-program, lender, insurer, or institutional source.

TECH

Technical or mobile problem

Report a broken button, hidden result, table overflow, chart issue, export defect, layout regression, or device-specific problem.

TEXT

Unclear explanation

Point out an assumption, warning, scenario, verdict, or explanation that appears incomplete, inconsistent, or difficult to understand.

IDEA

Calculator or feature suggestion

Suggest a calculator, comparison, risk check, scenario, export, or decision feature that would provide practical value.

OTHER

General or privacy inquiry

Use the form for general feedback, business or media questions, privacy requests, or another legitimate inquiry.

Accuracy reports

What to include when reporting a calculator problem

A complete report makes it possible to reproduce the calculation instead of guessing which input, source, formula, device, or page state caused the issue.

Calculator or page URL Paste the exact page address where the problem occurred.

Inputs used List the values, selected options, country, term, rate, or scenario.

Result received Describe the number, verdict, table row, chart, or export result shown.

Expected result Explain what you expected and why the displayed result may be incorrect.

Supporting source Include an authoritative source when available.

Example of a useful report

A short but specific report is usually more helpful than a long message without the page URL or calculation inputs.


              Calculator: Mortgage Payment Calculator Canada

              Loan amount: $400,000

              Rate: 5.00%

              Amortization: 25 years

              Frequency: Monthly

              Result received: $2,337

              Expected: approximately $2,326

Contact form

Send a message to NumeraHub

Use the form for calculator corrections, official source updates, technical problems, feedback, feature suggestions, business inquiries, or privacy requests.

contact.numerahub@gmail.com

Do not send passwords, banking credentials, full tax numbers, government identification, credit-card details, account numbers, or other unnecessary sensitive information.

or Used Supporting

Full Name

Email Address *

Used only if a response or clarification is needed.

Issue Type *

Select the type of message you are sending.

Calculator or Page URL

Paste the exact NumeraHub page where the issue occurred, if applicable.

Inputs Used

Optional. Mainly for calculator-result reports. List the values, selected options, country, term, rate, or scenario.

Result Received

Describe the number, verdict, table row, chart, or export result that appeared.

Expected Result

Explain what you expected and why the displayed result may be incorrect.

Official Source or Supporting Link

Include an official government, regulator, institutional, or other supporting source when available.

Message *

Add any other details that may help reproduce, investigate, or understand the issue.

Correction workflow

How reported issues are handled

Reports involving calculation accuracy, official data changes, or broken functionality receive priority. A report does not automatically mean the calculator is incorrect, but it provides a reason to reproduce and verify it.

Step 1

The page, inputs, device behaviour, and visible result are reproduced where possible.

Step 2

The formula, assumptions, source material, and result presentation are reviewed.

Step 3

A confirmed calculation, source, content, or technical defect is corrected.

Step 4

The affected calculation and interface flow are retested before the correction remains published.

What to expect

Review priorities and response limits

Messages are reviewed regularly, but response time can vary depending on the issue, investigation required, and current maintenance workload.

Accuracy receives priority

Reports involving formulas, totals, official data, broken calculations, or contradictory outputs are reviewed before general suggestions.

Not every message requires a reply

Useful feedback may still be reviewed or applied even when an individual response is not sent.

Complex issues may take longer

Calculations involving official rules, schedules, tax treatment, or multiple page states may require additional verification.

Professional boundaries and privacy

Please protect your personal information

NumeraHub contact channels are intended for calculator support, corrections, source updates, feedback, privacy requests, and legitimate business inquiries.

Individual financial advice is not provided through this form.

NumeraHub cannot recommend a particular loan, tax filing position, insurance policy, investment, mortgage product, legal action, or personalized financial strategy.

Confidential account information is not needed.

A calculator issue can normally be investigated using example inputs, the page URL, the displayed result, and an authoritative source.

Accountability

Who reviews calculator reports

Final responsibility for calculator architecture, source selection, publication, maintenance, and corrections remains with Oleksandr Domchynskyi, founder and calculator product developer at NumeraHub.

Oleksandr Domchynskyi

Founder & Calculator Product Developer responsible for product direction, calculation systems, source research, testing, publication, and maintenance.

Founder profile Methodology

NumeraHub transparency

Learn how the platform is built and maintained

Review the calculation methodology, learn more about NumeraHub, or return to the calculator hub.

Methodology About NumeraHub Browse calculators

Contact page reviewed June 2026